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LANSDOWNE CELTIC SEA LIMITED

Active Company number 05566785

LANSDOWNE CELTIC SEA LIMITED (company number 05566785) is a private limited company incorporated on 19 September 2005. Its status on the Companies House register is Active. Its registered office is in London, EC2A 4ES. Its nature of business (SIC 2007) is extraction of crude petroleum (06100). Its latest accounts we hold, for the period ending 31 December 2025, report net liabilities of £21.8m.

Source: Companies House register, as at 2 October 2026. How to cite this page

Information only, not advice. Register details and accounts figures are the company's own filings, shown as filed: CompanyStack does not audit or verify them and accepts no responsibility for decisions made on them. Check important facts at Companies House.

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Company Report on LANSDOWNE CELTIC SEA LIMITED (PDF)

Page 1 answers whether we would trade with it, and on what terms, by rules stated on the page. The register, the accounts and the people behind the company in one PDF, for your own business use.

  • The verdict: would we trade with it, on what terms: a starting credit limit from the latest balance sheet, the risk grade with its reasons, and the checks to make before you sign
  • Summary and Health Score: with the reasons behind the score
  • Red flags: and what changed in the last 12 months
  • Key figures: the accounts to 31 Dec 2025 against the year before
  • Filing deadlines: accounts due 30 Sep 2027; confirmation statement due 26 Sep 2027
  • Financials ledger: 4 years of filed accounts held (2022–2025)
  • Who runs and owns it: 1 PSC
  • Shareholders: the current register from the filings: each holder, class, shares and percentage
  • Charges: none on the register
  • Filing history and methodology: with sources and a disclaimer

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Company details

Company number
05566785
Status
Active
Company type
Private Limited Company
Incorporated
19 September 2005
Country of origin
United Kingdom
Registered office
C/O PINSENT MASONS LLP 30 CROWN PLACE
EARL STREET
LONDON
EC2A 4ES

Nature of business (SIC 2007)

Accounts and confirmation statement

Accounting reference date
31 December
Accounts category
TOTAL EXEMPTION FULL
Accounts last made up to
31 December 2025
Next accounts due
30 September 2027
Confirmation statement last made up to
12 September 2026
Next confirmation statement due
26 September 2027

Financial summary

Period ending31 December 202531 December 202431 December 202331 December 2022
Current liabilities£21.8m£21.8m£21.8m£21.7m
Net liabilities£21.8m£21.8m——
Employees3333

—: no figure read from the filing.

Figures read from filings at Companies House (ixbrl) and checked; see how we read them. Small-company accounts often omit turnover and profit. Spotted an error? Tell us.

Control, officers and charges

Persons with significant control
1 current (1 including ceased)
Corporate controllers
Lansdowne Oil And Gas Plc

Questions about LANSDOWNE CELTIC SEA LIMITED

Is LANSDOWNE CELTIC SEA LIMITED active?

Yes. The Companies House register shows the company's status as “Active”. (Companies House register, as at 2 October 2026.)

When was LANSDOWNE CELTIC SEA LIMITED incorporated?

LANSDOWNE CELTIC SEA LIMITED was incorporated on 19 September 2005, according to the Companies House register. (Companies House register, as at 2 October 2026.)

Where is LANSDOWNE CELTIC SEA LIMITED registered?

Its registered office is in London, EC2A 4ES. (Companies House register, as at 2 October 2026.)

Who controls LANSDOWNE CELTIC SEA LIMITED?

The register lists 1 current person with significant control (1 including those who have ceased). Corporate controllers named on the register: Lansdowne Oil And Gas Plc. The register shows control, not a list of shareholders. Individuals are named at https://find-and-update.company-information.service.gov.uk/company/05566785/persons-with-significant-control. (Companies House register, as at 2 October 2026.) Who owns a UK limited company: shareholders, PSCs and what the register shows

When are LANSDOWNE CELTIC SEA LIMITED's next accounts due?

The register shows the next accounts as due by 30 September 2027. Its latest accounts on the register were made up to 31 December 2025. (Companies House register, as at 2 October 2026.)

Does LANSDOWNE CELTIC SEA LIMITED file dormant accounts?

Not in its latest accounts. The register gives their category as “Total exemption accounts”, made up to 31 December 2025. (Companies House register, as at 2 October 2026.) What a dormant company is and what it must file

Is LANSDOWNE CELTIC SEA LIMITED on a sanctions list?

No match for this company's name on the sanctions lists CompanyStack screens (UK, EU, OFAC SDN, OFAC non-SDN, Canada, Australia, New Zealand, Japan, France, US CSL) as at 10 October 2026. A name screen is not legal clearance.

More extraction of crude petroleum companies

Industry overview: 1,130 active companies in SIC 06100

Other active companies registered at EC2A 4ES

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About CompanyStack

CompanyStack turns Companies House records into answers you can act on: who a company is, who runs and owns it, whether it keeps up with its filings and how its finances are moving. Every figure traces back to a public record, and we say when a record is missing.

Sources for company pages: Companies House (register, accounts, officers, PSCs, charges and filings), The Gazette (company insolvency notices only), the ONS Postcode Directory, official sanctions lists, including those of the UK (with UN designations), the EU, the US, Canada, Australia, New Zealand and France, and copies taken in April 2026 of the ICO register, the Charity Commission, CQC, Ofsted, Food Standards Agency and Environment Agency registers. Contains public sector information licensed under the Open Government Licence v3.0. CompanyStack is not affiliated with or endorsed by Companies House.

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Official register entry: LANSDOWNE CELTIC SEA LIMITED on Companies House.

Developers can fetch this profile as JSON with GET https://api.companystack.co.uk/company/05566785 — see the API documentation and pricing.