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  1. Companies
  2. Plumbers and heating engineers
  3. London
  4. Leak Detect Ltd

Leak Detect Ltd

ActiveNo accounts filed yet accountsPlumbers and heating engineersLondon
Company number
17103671
Incorporated
19 Mar 2026
Registered office
64 Southwark Bridge Road, London, SE1 0AS
Nature of business
Plumbing, heat and air-conditioning installation
Accounts due in
433 days
19 Dec 2027
From the Companies House register, 1 Oct 2026

Leak Detect Ltd is a newly incorporated private limited company registered in London, company number 17103671, one of 2,972 plumbing and heating companies in London. Its next accounts are due at Companies House on 19 December 2027, and its first CT600 is due at HMRC on 18 March 2028.

Key dates

This company has not filed accounts yet. First accounts are due 21 months after incorporation, and the first period can run longer than a year.

Accounts due
19 Dec 2027
in 433 days
For the period to 31 Mar 2027
CT600 due (first of two)
18 Mar 2028
in 523 days
Period 19 Mar 2026 to 18 Mar 2027
CT600 due (second of two)
31 Mar 2028
in 536 days
Period 19 Mar 2027 to 31 Mar 2027
Corporation tax payment
1 Jan 2028
in 446 days
9 months and 1 day after the period end
Confirmation statement
1 Apr 2027
in 171 days

Is this your company?

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Where Leak Detect Ltd is registered

Leak Detect Ltd's registered office on a map of the UK

The registered office is in London (SE1), in the Southwark local authority area, London. Show SE1 0AS on a map.

Other trade companies in SE1

Also registered at this address

22 other companies use the same registered office as Leak Detect Ltd.

What happens if Leak Detect Ltd files late

Companies House charges an automatic penalty the day after the deadline, and it rises the longer the accounts are late. These are the dates for this company's accounts due on 19 December 2027.

Companies HouseAccounts deliveredPenalty
Up to 1 month late20 Dec 2027 to 19 Jan 2028£150
1 to 3 months late20 Jan 2028 to 19 Mar 2028£375
3 to 6 months late20 Mar 2028 to 19 Jun 2028£750
More than 6 months lateFrom 20 Jun 2028£1,500

Penalties double if the accounts were also late the year before.

HMRC (CT600)FromPenalty
1 day late1 Apr 2028£200
3 months late30 Jun 2028another £200
6 months late30 Sep 2028HMRC estimates the tax and adds 10% of the unpaid tax
12 months late31 Mar 2029another 10% of any unpaid tax

For returns filed on or after 1 April 2026. Late three times in a row and the £200 penalties become £1,000 each.

Company details

As held on the Companies House register.

Company number
17103671
Status
Active
Company type
Private limited company
Incorporated
19 March 2026
Registered office
64 Southwark Bridge Road, London, SE1 0AS
Nature of business
Plumbing, heat and air-conditioning installation (SIC 43220)
Year end
31 March (accounting reference date)
Accounts type
No accounts filed yet

Filing notes for plumbing and heating companies

Plumbing and heating companies frequently work under CIS for main contractors and also directly for homeowners, so turnover can mix CIS and non-CIS income.

Similar companies in London

Other active plumbing and heating companies registered in London.

All plumbing and heating companies in London · All trades in London · Plumbers and heating engineers across the UK

Frequently asked questions

When are Leak Detect Ltd's accounts due?

Leak Detect Ltd's next accounts are due at Companies House by 19 December 2027 (in 433 days), covering the period to 31 March 2027.

When is Leak Detect Ltd's CT600 due?

The first accounts cover more than 12 months, so there are two Company Tax Returns: one for the 12 months to 18 March 2027, due by 18 March 2028, and one for the period to 31 March 2027, due by 31 March 2028. Corporation tax is payable 9 months and 1 day after the end of each.

Is Leak Detect Ltd still trading?

Leak Detect Ltd is listed as active on the Companies House register as of 1 Oct 2026. Active means it has not been dissolved or entered insolvency; it does not show whether it is currently taking on work.

What does Leak Detect Ltd do?

Leak Detect Ltd is registered under Plumbing, heat and air-conditioning installation (SIC 43220).

How old is Leak Detect Ltd?

Leak Detect Ltd was incorporated on 19 March 2026, less than a year ago.

What is the penalty if Leak Detect Ltd files its accounts late?

Companies House charges £150 if the accounts are up to 1 month late, £375 up to 3 months, £750 up to 6 months and £1,500 after that, doubled if the previous year's accounts were also late. HMRC charges £200 for a CT600 filed a day late and another £200 at 3 months.

Official records

View Leak Detect Ltd on Companies House for filed documents, officers and the full history.

Report an error on this page

Based on the Companies House register (snapshot 1 Oct 2026). Deadlines are worked out from the register and assume a standard accounting period; a change of year end or a short period moves them. This page is general information, not tax or accountancy advice.

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