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Quantum Blockchain Technologies plc

ActiveCompany number 03926192Public limited companyEst. 200070100 · Activities of head officesCity and County of the City of London, London
Official record ↗
Age26 years
older than 78% of its sector
Same activity, United Kingdom27,302live companies · 5879th oldest
In City and County of the City of London64,110live companies · 1,323 in the same activity
At this address51live companies incl. this one
Latest accounts2025group accounts, made up to 31 Dec 2025

In brief

Quantum Blockchain Technologies plc is a public limited company incorporated in England and Wales on 15 February 2000. At 26 years old it is older than 78% of the 27,302 live companies whose main activity is activities of head offices. Its registered office is in City and County of the City of London, City of London, London, at an address shared with 50 other live companies. 1,323 live companies in City and County of the City of London share the same main activity. Its latest accounts were made up to 31 December 2025 and filed as group accounts. It was previously called Clear Leisure plc, a name it changed on 6 May 2021, and has had 2 earlier names in all.

Register details

Registered nameQUANTUM BLOCKCHAIN TECHNOLOGIES PLC
Company number03926192
Company typePublic Limited Company
Registered officeFirst Floor, 1 Chancery Lane, WC2A 1LF London
JurisdictionEngland and Wales
Nature of business (UK SIC 2007)70100 Activities of head offices
International sector (ISIC Rev.4)M · 70 Activities of head offices; management consultancy activities

Timeline

Register events, newest first.

  • Confirmation statement made up
  • Accounts made upGroup accounts
  • Name changedPreviously Clear Leisure plc
  • Name changedPreviously Brainspark plc
  • Incorporated

Filings and charges

Deadlines and charge counts from the register.

Next accounts due30 June 2027
Accounting reference date31 December
Next confirmation statement13 April 2027
Last confirmation statement30 March 2026
Charges registered4
Outstanding · satisfied1 · 3

Charges are security interests (such as mortgages) registered against the company.

Activities of head offices in the United Kingdom

Live companies whose main activity is 70100: 27,302 in total, median age 16 years, 881 incorporated in the past 12 months.

All 27,302 companies
This company's decadeOther decades
02,5005,0007,50010,0001850s: 11850s1860s: 41860s1870s: 61870s1880s: 171880s1890s: 601890s1900s: 621900s1910s: 731910s1920s: 1331920s1930s: 1531930s1940s: 1431940s1950s: 2181950s1960s: 3541960s1970s: 5561970s1980s: 1,2731980s1990s: 2,7631990s2000s: 7,4362000s2010s: 9,2092010s2020s: 4,8412020s
Incorporated per year, still live
05001,0001,5002,0002011: 79420112012: 8252013: 95520132014: 1,1402015: 1,20620152016: 9922017: 88020172018: 7582019: 80720192020: 7062021: 61720212022: 6272023: 67420232024: 6972025: 79520252026: 725

Location

Registered office in City and County of the City of London, City of London, London.

City and County of the City of London
Live companies in City and County of the City of London64,110
Same activity in City and County of the City of London1,323
Live companies in City of London65,207
New in City and County of the City of London, past 12 months4,148

Also registered at this address

50 other live companies share this registered office; shown are those incorporated closest in time to this one.

Similar companies

Live companies with the same main activity, nearest first.

Compare all
IR
Information Resources (Holdings) LimitedCity and County of the City of London, London
Number 03926632Est. 2000
I
Immupharma plcCity and County of the City of London, London
Number 03929567Est. 2000
CH
Convergys Holdings (UK) LimitedCity and County of the City of London, London
Number 03935005Est. 2000
VI
Vrway International LimitedCity and County of the City of London, London
Number 03918766Est. 2000
MC
Msig Corporate Services (Europe) LimitedCity and County of the City of London, London
Number 03945348Est. 2000
SS
Services Support (Sel) Holdings LimitedCity and County of the City of London, London
Number 03912708Est. 2000

Sources

Register data: Companies House, Free Company Data Product, delivery of 1 October 2026. Places: ONS Postcode Directory (Open Government Licence v3.0). Sector names: Eurostat NACE Rev. 2. Context figures are computed by FirmsDB from these sources. This page is not an official register; check the official record before relying on it.