TM20 Ltd
- Company number
- NI638277
- Incorporated
- 5 May 201610 years trading
- Registered office
- 15 Laurel Hill Cottages, Park Laurel Hill Cottages, Park, Londonderry, BT47 4BL
- Nature of business
- Other specialised construction activities n.e.c.
TM20 Ltd is a 10-year-old private limited company registered in Londonderry, company number NI638277, one of 48 specialist construction companies in Londonderry. Its next accounts are due at Companies House on 29 June 2027, and the CT600 for the period to 29 September 2026 is due at HMRC on 29 September 2027.
Key dates
Worked out from the year end and filing history on the Companies House register.
Is this your company?
File the accounts to Companies House and the CT600 to HMRC yourself with A.X.E.L Filing. One set of questions, both filings, £49 flat. No accountant, no subscription.
File for TM20 LtdOr get a reminder before each deadline
Free. We email you 60, 30, 14, 7 and 1 days before the accounts, CT600 and confirmation statement are due. Unsubscribe in one click.
Finances
From each year's balance sheet filed at Companies House. Small companies do not have to publish turnover or profit, so these are balance sheet figures.
- Net assets up £4,560 (+247.3%) on the year before, to £6,404.
- Net assets rose in 4 of 8 year-on-year comparisons on record.
- Current assets of £55K against £76K owed within a year: 0.7 times cover.
- 1 employee on average during the year.
- Balance sheets on record for 9 years, 2017 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 30 Sep 2025 | £6,404 | £55K | £76K | 1 | |
| 30 Sep 2024 | £1,844 | £6,841 | £69K | 1 | |
| 30 Sep 2023 | £31K | £36K | £31K | 1 | |
| 30 Sep 2022 | £22K | £23K | £23K | 1 | |
| 30 Sep 2021 | £4,330 | £22K | £21K | 1 | |
| 30 Sep 2020 | £22K | £54K | £17K | 1 | |
| 31 May 2019 | £100 | £100 | |||
| 31 May 2018 | £100 | ||||
| 31 May 2017 | £100 |
Where TM20 Ltd is registered
The registered office is in Londonderry (BT47), in the Derry City and Strabane local authority area, Northern Ireland. Show BT47 4BL on a map.
Other trade companies in BT47
- RNK Contracts LimitedGroundworks and demolition
- Den Electrical LtdElectricians
- BDK Consulting LimitedProperty developers
- Oakline Engineering LtdInstallers
- Killew Property Services LimitedFacilities management
- PH Autobody LimitedMechanics and garages
- C Doherty Autos LtdMechanics and garages
- CPMH LtdBuilders
What happens if TM20 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 29 June 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 30 Jun 2027 to 29 Jul 2027 | £150 |
| 1 to 3 months late | 30 Jul 2027 to 29 Sep 2027 | £375 |
| 3 to 6 months late | 30 Sep 2027 to 29 Dec 2027 | £750 |
| More than 6 months late | From 30 Dec 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 30 Sep 2027 | £200 |
| 3 months late | 29 Dec 2027 | another £200 |
| 6 months late | 29 Mar 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 29 Sep 2028 | another 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
- NI638277
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 5 May 2016 (10 years ago)
- Registered office
- 15 Laurel Hill Cottages, Park Laurel Hill Cottages, Park, Londonderry, BT47 4BL
- Nature of business
- Other specialised construction activities n.e.c. (SIC 43999)
- Year end
- 29 September (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 30 September 2025
- Last confirmation statement
- 4 May 2026
- Previous names
- Bimcore Ltd (until 24 Sep 2019)
Filing notes for specialist construction companies
Specialist contractors often work under CIS for main contractors. Retentions held back by the customer still count towards turnover once the work is done.
Similar companies in Londonderry
Other active specialist construction companies registered in Londonderry.
- WL McCloskey & Sons Limited2012
- A Daly Ltd2003
- A1 Construction Plant & Machinery Training Centre Limited2015
- Alltradesni Ltd2026
- Amf Consultancy Ltd2026
- BDN Energy Ltd2023
- Berko Pod Systems Ltd2020
- CMG Contracts Limited2007
All specialist construction companies in Londonderry · All trades in Londonderry · Specialist contractors across the UK
Frequently asked questions
When are TM20 Ltd's accounts due?
TM20 Ltd's next accounts are due at Companies House by 29 June 2027 (in 259 days), covering the period to 29 September 2026.
When is TM20 Ltd's CT600 due?
The CT600 for the period to 29 September 2026 is due at HMRC by 29 September 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 30 June 2027.
Is TM20 Ltd still trading?
TM20 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 TM20 Ltd do?
TM20 Ltd is registered under Other specialised construction activities n.e.c. (SIC 43999).
How old is TM20 Ltd?
TM20 Ltd was incorporated on 5 May 2016, 10 years ago.
What is the penalty if TM20 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 TM20 Ltd on Companies House for filed documents, officers and the full history.
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.