- Companies
- Civil engineering
- Olney
- Chiltern Thrust Bore Ltd.
Chiltern Thrust Bore Ltd.
- Company number
- 02931367
- Incorporated
- 20 May 199432 years trading
- Registered office
- Chiltern House, 15 Stilebrook Road, Olney, Buckinghamshire, MK46 5EA
- Nature of business
- Construction of other civil engineering projects n.e.c.
Chiltern Thrust Bore Ltd. is a 32-year-old private limited company registered in Olney, company number 02931367, one of the UK's civil engineering contractors. Its next accounts are due at Companies House on 30 April 2027, and the CT600 for the period to 31 July 2026 is due at HMRC on 31 July 2027.
Key dates
Worked out from the year end and filing history on the Companies House register.
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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 down £202K (-63.8%) on the year before, to £115K.
- Net assets rose in 2 of 9 year-on-year comparisons on record.
- Current assets of £407K against £320K owed within a year: 1.3 times cover.
- 10 employees on average during the year.
- Balance sheets on record for 10 years, 2016 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Jul 2025 | £115K | £23K | £407K | £320K | 10 |
| 31 Jul 2024 | £317K | £100K | £484K | £274K | 10 |
| 31 Jul 2023 | £369K | £144K | £471K | £212K | 10 |
| 31 Jul 2022 | £565K | £398K | £686K | £180K | 10 |
| 31 Jul 2021 | £654K | £341K | £693K | £210K | 10 |
| 31 Jul 2020 | £770K | £385K | £764K | £207K | 13 |
| 31 Jul 2019 | £930K | £707K | £919K | £236K | 13 |
| 31 Jul 2018 | £798K | £705K | £938K | £345K | 15 |
| 31 Jul 2017 | £614K | £406K | £921K | £508K | 15 |
| 31 Jul 2016 | £738K | £641K | £978K | £444K | 13 |
Where Chiltern Thrust Bore Ltd. is registered
The registered office is in Olney (MK46), in the Milton Keynes local authority area, South East. Show MK46 5EA on a map.
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What happens if Chiltern Thrust Bore 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 30 April 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 May 2027 to 31 May 2027 | £150 |
| 1 to 3 months late | 1 Jun 2027 to 31 Jul 2027 | £375 |
| 3 to 6 months late | 1 Aug 2027 to 31 Oct 2027 | £750 |
| More than 6 months late | From 1 Nov 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Aug 2027 | £200 |
| 3 months late | 31 Oct 2027 | another £200 |
| 6 months late | 31 Jan 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Jul 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
- 02931367
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 20 May 1994 (32 years ago)
- Registered office
- Chiltern House, 15 Stilebrook Road, Olney, Buckinghamshire, MK46 5EA
- Nature of business
- Construction of other civil engineering projects n.e.c. (SIC 42990)
- Year end
- 31 July (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 July 2025
- Last confirmation statement
- 7 November 2025
- Charges (mortgages)
- 1 outstanding of 2 registered
Filing notes for civil engineering contractors
Civil engineering contractors usually carry plant and machinery, so capital allowances (the annual investment allowance and the main pool) do much of the work in the corporation tax computation.
Similar companies in Olney
Other active civil engineering contractors registered in Olney.
- Alhamdani Consultants Limited1994
- Clarke's Mechanical Limited1994
- WPH Limited1994
- Andrem Limited1994
- Atebion Cyf.1994
- Phoenix Civil Engineering Limited1994
- Capital Construction (G.B.) Limited1994
- Tower Maintenance Limited1994
All civil engineering contractors in Olney · All trades in Olney · Civil engineering across the UK
Frequently asked questions
When are Chiltern Thrust Bore Ltd.'s accounts due?
Chiltern Thrust Bore Ltd.'s next accounts are due at Companies House by 30 April 2027 (in 200 days), covering the period to 31 July 2026.
When is Chiltern Thrust Bore Ltd.'s CT600 due?
The CT600 for the period to 31 July 2026 is due at HMRC by 31 July 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 May 2027.
Is Chiltern Thrust Bore Ltd. still trading?
Chiltern Thrust Bore 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 Chiltern Thrust Bore Ltd. do?
Chiltern Thrust Bore Ltd. is registered under Construction of other civil engineering projects n.e.c. (SIC 42990).
How old is Chiltern Thrust Bore Ltd.?
Chiltern Thrust Bore Ltd. was incorporated on 20 May 1994, 32 years ago.
What is the penalty if Chiltern Thrust Bore 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 Chiltern Thrust Bore 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.