Northwest Computer Museum is located on the 4th floor of the historic Leigh Spinners Mill

The Northwest Computer Museum is a hands-on, community-focused tech museum located on the 4th floor of the historic Leigh Spinners Mill in Greater Manchester.

Northwest Computer Museum is located on the 4th floor of the historic Leigh Spinners Mill
Northwest Computer Museum is located on the 4th floor of the historic Leigh Spinners Mill

Founded by Joe Kay, the museum actively breaks the traditional “sterile, behind-glass” rule. Instead, it allows visitors to physically operate, play, and code on over 100 fully working retro machines.

The institution combines nostalgia, tech preservation, and modern digital education, sourcing its hardware through donations, personal sourcing, and an eco-friendly alliance with the Wigan Council Recycling Centre.

Key Features & Exhibits

  • Hands-on Computing: Over 140 operational items ranging from the 1970s up to 2010.
  • Immersive Period Rooms: Built-in 1970s and 1980s retro office environments equipped with era-accurate hardware.
  • Retro Gaming Zone: A nostalgic arcade room stocked with sponsored, functional arcade units and classics like the Commodore 64.
  • Education Suite & Repair Lab: A teaching hub where visitors learn coding basics (like BASIC) and physical electronic repair.
  • VR & Modern Tech Lab: An advanced space utilizing modern virtual reality tech, including specialized Omni VR treadmills.
  • Free Access Community Cyber Cafe: An on-site internet cafe that requires zero admission fee, offering locals free use of computers, printers, and web access.

Timeline by Year

  • 2018
    • Founder Joe Kay runs a successful one-week pop-up exhibition in the local area.
    • The explosive reaction from children refusing to leave the vintage machines serves as the primary inspiration for a permanent site.
  • 2021
    • The foundational idea for a permanent establishment begins taking clear shape.
    • Development talks commence with the chief executive of Wigan Council to acquire a lasting base.
  • 2022
    • October: Full scale construction begins inside Leigh Spinners Mill, a Grade II listed 1913 cotton mill.
    • October: The team hosts its first public fundraising jumble sale to clear excess stock and fund critical electrical work.
  • 2023
    • June: The Northwest Computer Museum officially opens to the public on June 3rd.
    • December: The museum institutes its popular “Late Night Wednesdays,” dropping admission prices by half after 4 PM to support after-school and after-work visits.
  • 2024
    • The museum significantly grows its outreach program, organizing specialized interactive workshops with visiting tech enthusiast clubs, like the Yorkshire Amiga Group.
  • 2025
    • May: The museum completes a major floor redesign, organizing its history chronologically.
    • They receive a significant donation archiving a 1980s software developer’s life work and launch their interactive Virtual Reality treadmill lab.
  • 2026 (Current Year)
    • April: To combat localized inflation and rent increases, standard main-museum ticket pricing shifts from £7 to £8 for adults.
    • The facility continues to run its free-entry community cyber cafe.

The Northwest Computer Museum in Leigh is a highly interactive, hands-on archive of computing and gaming history. Housed in the historic Leigh Spinners Mill, the museum features over 200 working exhibits spanning from the 1970s to modern-day Virtual Reality. It is a volunteer-run community space.

Key Highlights

Hundreds of classic games, tapes, disks, and cartridges are preserved, alongside physical computing books and historical displays like the BBC Micro and the ZX Spectrum
Hundreds of classic games, tapes, disks, and cartridges are preserved, alongside physical computing books and historical displays like the BBC Micro and the ZX Spectrum
  • Hands-On Exhibits: Unlike traditional museums, the focus is on interaction. Visitors can play classic retro video games, try out vintage consoles, and see legendary brands like Apple, Acorn, Atari, Amiga, Commodore, Sega, and Sinclair in action.
  • Retro Arcade & VR: The space includes dedicated retro arcade cabinets and a modern VR suite complete with immersive treadmill technology.
  • The Archive: Hundreds of classic games, tapes, disks, and cartridges are preserved, alongside physical computing books and historical displays like the BBC Micro and the ZX Spectrum.
  • Community Facilities: The museum features a library, internet café, training rooms, and a dedicated repair/workshop facility for local tech projects.

Visitor Information:

  • Location: 4th Floor, Leigh Spinners Mill, Park Lane, Leigh, Greater Manchester, WN7 2LB.
  • Facebook: https://www.facebook.com/share/1DcD18ZBDy/
  • Instagram: https://www.instagram.com/nwcomputermuseum
  • Hours: Open Wednesday (10 AM–8 PM) and Thursday through Sunday (10 AM–4 PM). Note: Entry to the cafe is free, but museum entry requires a ticket.
  • Facilities: Features free onsite parking, wheelchair-accessible lifts, and an onsite café serving hot/cold food and drinks.

You can check current admission rates, upcoming workshops, and special events directly on the Northwest Computer Museum Facebook Page.

Northwest Computer Museum is located on the 4th floor of the historic Leigh Spinners Mill
Northwest Computer Museum is located on the 4th floor of the historic Leigh Spinners Mill

The University of Greater Manchester based in Bolton

The University of Greater Manchester (formerly known as the University of Bolton from 2005 to 2024) is a public university based in Bolton, Greater Manchester, England.

University of Greater Manchester, from 2024

It is a “post-92” institution that officially rebranded in late 2024 to reflect its regional focus and, according to its vice-chancellor, to overcome employer prejudice against the smaller town name of Bolton. I studied Computing at Bolton Institute of Higher Education (BIHE) between 1988 to 1990 before it was elevated to University status.

LinkedIn Group: 

https://www.linkedin.com/groups/51224

The university dates its roots back to 1824 and focuses on applied research, practical skills, and teaching, with a strong regional reputation for student satisfaction. 


🏛️ Comprehensive Insight: University of Greater Manchester 

  • Location: Main campus on Deane Road and Derby Street in Bolton town centre, with a new city-centre partner campus (“UoB Manchester”) opened in 2023.
  • Origins: Founded as Bolton Mechanics’ Institute in 1824–1825.
  • Status: Granted taught degree-awarding powers in 1990/1992 and full university status in 2004/2005.
  • Key Focus: Teaching-intensive with a focus on employability, particularly in Nursing, Engineering, Business, and Creative Arts.
  • Size: Approximately 11,000–12,500 students, including international partnerships (e.g., Ras Al Khaimah, Colombo).
  • Rebrand: The University of Bolton rebranded to the University of Greater Manchester on December 20, 2024

📜 Detailed Historic Timeline (1824–2025)

Era 1: Foundations (1824–1900)

  • 1824/1825: Establishment of the Bolton Mechanics’ Institute to provide technical education to the working population.
  • Late 19th Century: The Institute becomes a vital hub for adult education in industrial Bolton. 

Era 2: The Technical Institution (1900–1980)

  • Early 20th Century: The institution becomes known as Bolton Technical College, expanding technical and scientific skills.
  • 1950s–1960s: Expansion of teacher training and higher-level technical qualifications.
  • 1964: A 50-ton steam hammer is used at Thomas Walmsley’s Atlas Forge, which later becomes a heritage exhibit on the university’s Deane Campus. 

Era 3: Formation of Higher Education (1980–2003)

  • 1982: Bolton Institute of Higher Education (BIHE) is formed by merging the technical and education colleges.
BIHE – Bolton Institute of Higher Education
  • 1990s: Gained taught degree-awarding powers (1990/1992) and research degree powers (1996).
  • 1998: Mollie Temple becomes principal, leading a successful drive for full university status. 
BIHE, view from front left side

Era 4: The University of Bolton (2004–2024)

  • 2004–2005: Formally inaugurated as the University of Bolton following Privy Council approval.
University of Bolton, 2004 – 2024 – UoB
  • 2012: Opened the £31 million “Bolton One” health and research facility in partnership with local NHS and council.
  • 2019/2020: Responded to “The Cube” fire incident and launched initiatives during the COVID-19 pandemic.
  • 2023: Opened a new partner campus in Manchester city centre (“UoB Manchester”) and initiated the name change process. 

Era 5: The University of Greater Manchester (2024–Present) 

  • Dec 20, 2024: Officially rebranded to the University of Greater Manchester.
University of Greater Manchester (front) from Dec 20, 2024
  • 2025: Facing internal investigations regarding governance and financial management, while focusing on expanding health and engineering sectors. 

The University of Greater Manchester based in Bolton

Website Author, Higher National Diploma – HND in Computer Studies in 1990 at BIHE
BIHE, view from left side

Bolton Institute of Higher Education (BIHE), 1982 to 2004

The Bolton Institute of Higher Education (BIHE), which officially existed between 1982 and 2004, is the direct predecessor to the current University of Bolton (now rebranded as the University of Greater Manchester). Its roots extend back to the early 19th century, evolving from a Technical School into a major centre for higher education. 

Bolton Institute of Higher Education (BIHE) before the rebuild to the university.

LinkedIn Group: https://www.linkedin.com/groups/51224

Overview of Bolton Institute of Higher Education

  • Formation: Established in 1982 through the merger of Bolton Institute of Technology and Bolton College of Education (Technical).
  • Status: A “post-92” institution that developed from a vocational technical college to a degree-awarding Higher Education body.
  • Key Powers: Gained taught-degree awarding powers in 1992 and research degree awarding powers in 1995/1996.
  • Key Locations: Based at the Deane Campus (Deane Tower completed 1970) and Chadwick Campus.
  • Final Evolution: Achieved university status in 2004/2005. 

Detailed Historic Timeline (1824–2024) 

Era 1: Foundations (Mechanics’ Institute to Technical College)

  • 1824-1825: Bolton Mechanics’ Institute is established, marking the educational origins of the institution.
  • 1887: A new Technical School is created with student numbers rising above 1,500.
  • 1926: Bolton Technical School is renamed Bolton Technical College.
  • 1941: A new building is opened for technical and engineering education.
  • 1946: Bolton Training College is approved by the Ministry of Education.
  • 1959: Bolton Training College settles at Chadwick Street. 

Era 2: The Technical and Institute Era (1960s–1981) 

  • 1960s: Development of Bolton College of Education at Chadwick Street.
  • 1964: Bolton Technical College and Bolton Institute of Technology (BIT) are divided into separate organisations. A.J. Jenkinson serves as principal for both in succession.
  • 1970: Deane Tower (Deane Campus) is completed.
  • 1971: A technology block and sports hall (later the Excel Centre) are added. 

Era 3: Formation of BIHE (1982–2004) 

  • 1982: Bolton Institute of Technology and Bolton College of Education merge to form Bolton Institute of Higher Education (BIHE). John McKenzie is the first principal.
  • 1990: The Institute gains its own taught-degree awarding powers.
  • 1991: An £8.3 million extension project begins, including the purchase of the former Eagle Factory.
  • 1992: Reorganisation following the Further and Higher Education Act 1992.
  • 1995/1996: Awarded research degree awarding powers.
  • 1998: Mollie Temple becomes the third principal, leading the drive for university status.
  • 2004: BIHE is granted university status.
  • 2005: The institution is officially named the University of Bolton. 

Era 4: Modern Era (University of Bolton to University of Greater Manchester) 

  • 2009-2010: Rebranding and opening of the new Deane Road campus building.
  • 2018: Bolton College merges with the University of Bolton.
  • 2023: Application made to change the name to the University of Greater Manchester.
  • 2024: The university begins operating as the University of Greater Manchester. 

Key Historical Links & Resources

Liverpool Docks Overview and Historic Timeline by Era and Year

The Liverpool docks system represents one of the world’s most significant maritime developments, evolving from a small tidal inlet into a 7.5-mile interconnected network that handled 40% of global trade by the late 19th century. Starting with the world’s first enclosed commercial wet dock in 1715, Liverpool pioneered dock technology and fireproof warehouse construction, eventually becoming the “New York of Europe”. 

Timeline of Development by Era

1715–1815: The Rising Port & Global Trade 

This era saw Liverpool’s rapid ascent driven by trade with the Americas and the city’s heavy involvement in the Atlantic Slave Trade. 

  • 1715: The Old Dock opens as the world’s first commercial wet dock, allowing ships to unload regardless of the Mersey’s high tidal range.
  • 1753Salthouse Dock (originally South Dock) opens to service the nearby saltworks.
  • 1765: Three Canning Graving Docks are built for ship maintenance.
  • 1771George’s Dock opens (later the site of the Three Graces).
  • 1788King’s Dock opens.
  • 1796Queen’s Dock opens.
Liverpool Docks Overview and Historic Timeline by Era and Year
Images taken 8th April 2026. by website author (Mark Whitfield)

1815–1914: The “Western Gateway” & Technological Pioneer 

Liverpool became the second port of the British Empire, serving as the main hub for the Industrial Revolution and mass emigration. 

  • 1821Prince’s Dock opens.
  • 1826: The Old Dock is filled in as it becomes too shallow; the Custom House is later built on the site.
  • 1830Clarence Dock opens specifically for steamships.
  • 1832Brunswick Dock opens.
  • 1846: The Royal Albert Dock is officially opened by Prince Albert, featuring the world’s first fireproof, non-combustible warehouse system.
  • 1848StanleyCollingwoodNelson, and Bramley-Moore docks open under engineer Jesse Hartley.
  • 1852Huskisson Dock opens.
  • 1858Canada Dock opens to handle the massive timber trade.
  • 1879Langton Dock opens.
  • 1880Alexandra Dock opens.
  • 1893: The Liverpool Overhead Railway opens, the world’s first electric elevated railway, to transport workers along the 7-mile dock line.
  • 1913: The Gladstone Graving Dock opens, then one of the largest in the world. 

1914–1980s: Decline & Containerisation

Post-war economic shifts and the advent of large container ships made the central, narrow docks obsolete. 

  • 1927Gladstone Dock complex is completed.
  • 1941: Heavy bombing during the Liverpool Blitz damages the Custom House and many dock structures.
  • 1971: The Albert Dock and most south docks close to commercial traffic.
  • 1972Seaforth Dock opens as a modern deep-water container and grain terminal at the mouth of the Mersey. 

1981–Present: Regeneration & Modern Port

The derelict docks were transformed into cultural and residential hubs while the working port moved north. 

  • 1981: The Merseyside Development Corporation is formed to regenerate the abandoned waterfront.
  • 1984: The first phase of the redeveloped Royal Albert Dock opens, coinciding with the Tall Ships Race.
  • 1988Tate Liverpool opens in the Albert Dock warehouses.
  • 2004: Liverpool’s waterfront is designated a UNESCO World Heritage Site (status revoked in 2021).
  • 2009: The Liverpool ONE shopping complex is completed on the site of the Old Dock, with parts of the original dock walls preserved for tours.
  • 2016Liverpool2, a new deep-water container terminal, opens at Seaforth to handle the world’s largest ships. 

For further reading on the structural and strategic history, you can find Liverpool Docks: A Short History by David Paul at Hive.co.uk or used copies at AbeBooks.co.uk. 

Liverpool Docks Overview and Historic Timeline by Era and Year

Bolton Market Place – About and Timeline History with Images

Bolton Market Place is a major retail and leisure destination in Bolton town centre, primarily housed within the Grade II listed Victorian Market Hall. Originally opened in 1855, it was once celebrated as the “largest covered market in the kingdom” and serves as a historical anchor for the town’s commercial heart. 

Market Place Bolton is a Grade II listed shopping and leisure destination located in the heart of Bolton town centre. Originally opened in 1855 as a covered market hall, it was once considered the largest in the kingdom. Today, it combines historic Victorian architecture—including its famous restored ironwork and glass roof—with modern retail and entertainment facilities. 

Shopping & Major Retailers

The centre spans two floors of retail space and features a mix of high-street giants and independent boutiques. 

  • Key Retailers: Primark (new 40,000 sq ft store opened Dec 2024), Next, H&M, New Look, JD Sports, River Island, and Footasylum.
  • Specialty Stores: Pandora, Hotel Chocolat, The Body Shop, and The Entertainer.
  • Recent Additions: The Works (opened 2024) and Carrs Pasties (opened 2026). 

Dining: The Vaults

The lower ground floor houses The Vaults, a converted Victorian basement that retains original stonework and atmospheric archways. 

  • Restaurants: Popular chains such as Nando’s and Prezzo, alongside various bars and cafes.
  • Food Court: A vibrant hub for socialising with a range of global cuisines. 

Leisure & Entertainment

Market Place has pivoted toward being a “leisure-first” destination to combat declining retail trends. 

  • The Light Cinema: A luxury 9-screen multiplex cinema located on the top floor.
  • Family Activities: Includes Amazonia (kids’ play area with adventure golf and a train), an escape room, and an indoor crazy golf course.
  • Events: The centre regularly hosts free events, such as art exhibitions and “Little Rascals” kids’ club activities. 

Visitor Information

  • Parking: On-site multi-storey car park with over 500 spaces. Offers competitive rates, often including incentives like one hour free.
  • Accessibility: Fully accessible for disabled visitors, with dedicated parking and a free wheelchair service available from the Customer Service desk.
  • Location: Knowsley Street, Bolton, BL1 2AL. It is roughly a 10-minute walk from the main bus and train stations. 

Historical Timeline of Bolton Market Place

The Victorian Era: Foundation & Grandeur

  • 1251: Bolton is granted a Royal Charter to hold a market, originally held on Mondays in the Churchgate area.
  • 1482: The Market Cross is first established at the entrance to Churchgate as a landmark for trade.
  • 1855: The Bolton Market Hall officially opens on 19 December. Designed by architect G. T. Robinson, it cost £50,000 and featured a massive cast-iron and glass roof.
  • 1865: A dedicated Fish Market is added next to the main hall at a cost of £30,000, further establishing Bolton as a major trading hub in the North.
  • 1894: The hall undergoes its first major modifications, including the addition of exterior shops on Knowsley Street and Corporation Street. 

Early to Mid-20th Century: Adaptation

  • 1909: The current version of the Market Cross is commissioned with bronze plaques detailing the town’s history.
  • 1932: The Victorian fish market is demolished as trade shifts toward the new Ashburner Street market.
  • 1938: The interior layout is modernised, replacing long rows of stalls with roofed islands to better manage foot traffic. 

Late 20th Century: The Shopping Centre Era 

  • 1982: A competition to redevelop the site into a modern shopping mall is won by Chapman Taylor Partners.
  • 1988: The refurbished site is reopened by Queen Elizabeth II as the Market Place Shopping Centre on 1 December.
  • 1998: Sunday trading is briefly suspended in the Market Hall due to low trader turnout. 

21st Century: Modernisation & Leisure 

  • 2004: Controversial plans to move traditional market stallholders out of the hall spark a petition with over 80,000 names.
  • 2007: After 151 years of traditional trading, the last 50 stallholders move out to allow for a full retail conversion.
  • 2008: The modernised Market Place, featuring units “slotted” into the historic listed structure, officially opens in October.
  • 2013: The centre is acquired by Moorgarth, who announce a £15 million investment plan.
  • 2016–2017: The development of The Vaults (dining/leisure in the basement) and a new 9-screen cinema on the roof is completed.
  • 2025: The centre continues to evolve with ongoing development plans to further enhance its position as a leading regional destination. 

Images through the years :

Last 3 images taken by Mark Whitfield (website author) in early 2026

Bolton Market Place – About and Timeline History with Images

MediaCityUK Photo Journal and Historical Timeline, Salford Quays

Mark Whitfield is a photographer who has documented the development of MediaCityUK in Salford Quays through an extensive “Photographic Build Timeline Journal”. His collection includes over 15,000 images that capture the site’s transformation from a derelict dockland into a global media hub. 

MediaCityUK Photo Timeline

Mark Whitfield: Photography Overview

  • Project Focus: Whitfield began documenting the rise of MediaCityUK in May 2007, specifically focusing on the construction of the BBC’s new northern home.
  • Visual Documentation: His work is described as a unique photo timeline that charts the incredible structural changes at the site over several years.
  • Background: Beyond his photography, Whitfield has a background in IT project management and has worked in Salford Quays for over 15 years.
  • Galleries: Much of his work is hosted on his personal website, mark-whitfield.com, and he has shared specific milestones on platforms like Flickr and Instagram
MediaCityUK site in 2007

Historical Timeline of MediaCityUK

The following timeline integrates key development milestones with Whitfield’s photographic journey:

  • 2004–2006: Pre-Construction Phase
    • The BBC signals its intention to move jobs to Manchester (2004).
    • Salford Quays is officially chosen as the site for the new development (June 2006).
  • 2007: Construction Begins
    • May 18, 2007: Mark Whitfield captures his first timeline photo, marking the start of the build.
    • The first “spade in the ground” occurs as Peel Group and Bovis Lend Lease begin work.
    • The Pie Factory, a refurbished bakery, opens as the first working studio complex.
  • 2008–2009: Structural Growth
    • Whitfield continues extensive documentation; photos from April 2008 and February 2009 capture the rising concrete frames of the main buildings.
    • The high-rise 2,116-space multi-storey car park is completed (August 2009).
  • 2010: Infrastructure Milestones
    • The MediaCityUK Metrolink station opens (September 20), connecting the site to the wider Manchester tram network.
    • First trial show is recorded in Studio HQ2 (November), featuring a simulated power failure and evacuation.
    • Initial infrastructure is completed by December.
  • 2011: Operational Launch
    • January 2011: Dock10 studios become operational.
    • February 2011: The first program, Don’t Scare the Hare, is filmed at MediaCityUK.
    • May 2011: BBC staff begin moving into three dedicated buildings: Bridge House, Dock House, and Quay House.
    • October 2011: The University of Salford opens its new media academy at the site.
  • 2012–2014: Full Integration
    • April 2012: The Queen and Duke of Edinburgh officially open MediaCityUK.
    • March 2013: ITV completes its move to the site.
    • January 2014: Coronation Street records its first episode at the new production facility on Trafford Wharf.
  • 2015–2021: Expansion & Sustainability
    • 2016: Completion of “Tomorrow,” the final building in Phase One.
    • 2020: The Pie Factory closes and is demolished to make way for Phase Two.
    • 2021: MediaCityUK buildings become the first in the UK to achieve net-zero carbon status. 
MediaCityUK building beginning to take shape in late 2008

Higher National Diploma (HND) in Computer Studies, Bolton Institute of Higher Education (BIHE)—now the University of Greater Manchester

The Higher National Diploma (HND) in Computer Studies at the Bolton Institute of Higher Education (BIHE)—now the University of Greater Manchester—is a two-year, Level 5 vocational qualification designed to provide practical, industry-specific skills. 

LinkedIn Group: https://www.linkedin.com/groups/51224

BIHE / University of Greater Manchester Evolution

The institution has undergone several name changes and status upgrades that affected the delivery of the HND: 

  • 1982: BIHE was formed through the merger of Bolton Institute of Technology and Bolton College of Education (Technical).
  • 1992: The Institute was granted the power to award taught degrees.
  • 2004/2005: BIHE achieved full university status, becoming the University of Bolton.
  • 2024: The university rebranded as the University of Greater Manchester

HND Computer Studies: Detailed Timeline

The course traditionally follows a two-year full-time or three-year part-time structure. 

Year 1: Foundations (HE4 Level)

The first year focuses on establishing core technical and business knowledge. In many versions of the Bolton curriculum, Year 1 is common across several computing programmes to allow for flexible progression. 

  • Core Modules:
    • Introduction to Programming: Developing fundamental coding logic.
    • Computer Platforms & Systems Architecture: Understanding the hardware and software environments.
    • Information Systems & Databases: The basics of data management.
    • Website Production & Networking Fundamentals: Introduction to web technologies and connectivity.
    • Quantitative Techniques & Business Studies: Integrating mathematical and commercial contexts. 

Year 2: Specialisation (HE5 Level)

The second year shifts toward advanced application, systems analysis, and professional practice. 

  • Advanced Modules:
    • Systems Analysis & Design: Producing system requirements and user interface specifications.
    • Programming Methodology: Moving into more complex application development.
    • Business Information Systems: Exploring how IT supports organizational requirements.
    • Database Design: Implementing industry-standard database packages.
  • Final Year Project: A major 20-credit core project where students investigate a specific field and apply their cumulative skills to a real-world scenario. 

Progression and Modern Standards

  • Academic Standing: Completion of the HND is equivalent to the first two years of a Bachelor’s degree (Level 5).
  • Degree Top-Up: Successful HND graduates can typically proceed directly into the final year (Level 6) of the BSc (Hons) Computer Science or BSc (Hons) Computing at Bolton.
  • Modern HTQs: Current versions of the course, such as the HND Computing for England (HTQ), now integrate modern fields like Artificial IntelligenceCloud Computing, and VR technologies.
1988 to 1990 : University of Greater Manchester (previously Bolton Institute of Higher Education – BIHE)
Higher National Diploma (HND) in Computer Studies, Bolton Institute of Higher Education (BIHE)—now the University of Greater Manchester

University of Greater Manchester Bolton formerly Bolton Institute BIHE LinkedIn

University of Greater Manchester Bolton formerly Bolton Institute BIHE LinkedIn

Group link: https://www.linkedin.com/groups/51224