Active11249840Private limited companyYork

CALIBRATED GEOSCIENCE UK LTD.

Significant control: Timothy James Stephen Sykes (50–75%), Anna Kathryn Porter (25–50%)

Companies HouseCompanies House

From public filings as at 31 Aug 2026; may contain errors or be out of date. Verify at Companies House · Terms

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What does Calibrated Geoscience UK Ltd. sell?

Registered activity: Support activities for petroleum and natural gas mining (SIC 09100). We’re building product and service lists for UK companies. Get this one when it’s ready.

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01

Summary

Generated from filed data · no estimates

CALIBRATED GEOSCIENCE UK LTD. is an active private limited company (company number 11249840) incorporated on 12 March 2018, registered in York. Its registered activity is support activities for petroleum and natural gas mining (SIC 09100). Latest small accounts cover the period ending 31 March 2025, showing net assets of £2,719 and cash of £26k, with 1 employee on average. Net assets fell 86% on the prior period (£19k).

Peer position · net assets

By net assets it sits in the lower half of 420 comparable companies in Other (median £9,697, upper quartile £48k).

02

Ownership and control

2 active · 1 other
  • Dr Timothy James Stephen Sykes
    Individual · since 12 March 2018
    • owns 50–75% of shares
    • holds 50–75% of voting rights
    • can appoint or remove directors
  • Ms Anna Kathryn Porter
    Individual · since 13 March 2018
    • owns 25–50% of shares
    • holds 25–50% of voting rights
    • can appoint or remove directors
  • Ms Anna Kathryn Porter
    Individual · since 12 March 2018 · ceased 3 August 2026
    • owns 25–50% of shares
    • holds 25–50% of voting rights
    • can appoint or remove directors

Persons with significant control hold 25% or more of shares or voting rights. Smaller shareholdings are only listed in confirmation-statement documents. Directors and secretaries: see the officers list at Companies House.

03

Key dates

Incorporated
12 March 20188 yrs ago
Next accounts due
31 December 2026in 68 days
Confirmation statement due
26 March 2027in 153 days

Due dates are expected from Companies House filing rules; confirm on the official register before relying on them.

04

Activity

SIC 09100
Support activities for petroleum and natural gas mining
Accounts type
Total Exemption Full
Size band
MicroCompanies Act thresholds
05

Financials

2 periods on record · latest ending 31 March 2025
Net assets
£2,719
−86%vs Mar 2024
Cash at bank
£26k
−30%vs Mar 2024
Turnover
Not reported
Employees
1
No changevs Mar 2024
Net assets
£2,719
Cash at bank
£26k
Average employees
1
Filed accounts by period, newest first
Period endNet assetsCashDebtorsCreditors <1yTurnoverProfitEmployees
31 March 2025£2,719£26k£363£6,882——1
31 March 2024£19k£37k£7,307£5,469——1
Current ratio3.8Current assets ÷ creditors within one year
Cash per employee£26kCash ÷ average employees

Figures as filed in iXBRL accounts at Companies House. "—" means the line was not reported in that filing.

06

Filing and accounts signals

Facts from the register · no rating
  • Net assets above zeroNet assets £2,719 at 31 March 2025
  • Net assets down 25% or more on the prior period-85.7% vs prior period
  • Current assets at least 1.5× creditors within one yearCurrent ratio 3.8
  • Incorporated five or more years agoIncorporated 12 March 2018

Neutral facts read from the register and filed accounts, each with its evidence. They are not a rating, a prediction or advice, and may be incomplete or out of date. How each signal is derived.

07

Timeline

Newest first
  1. Confirmation statement duein 153 days
  2. Next accounts duein 68 days
  3. Accounts period endNet assets £2,719 · small accounts
  4. Accounts period endNet assets £19k · small accounts
  5. Incorporated
08

Similar companies in the UK

Same activity (support activities for petroleum and natural gas mining), closest in incorporation date
09

Reminders for CALIBRATED GEOSCIENCE UK LTD.

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Source: Companies House register, snapshot 2026-08-31; accounts from the Companies House accounts data product. Open Government Licence v3.0. View on Companies House. Methodology · About · Markdown.