- Companies
- Property developers
- Doncaster
- Simplex Supplies Limited
Simplex Supplies Limited
- Company number
- 07563454
- Incorporated
- 14 Mar 201115 years trading
- Registered office
- Loversall Hall Rakes Lane, Loversall, Doncaster, South Yorkshire, DN11 9DD
- Nature of business
- Development of building projects; Wholesale of wood, construction materials and sanitary equipment
Simplex Supplies Limited is a 15-year-old private limited company registered in Doncaster, company number 07563454, one of 323 property development companies in Doncaster. Companies House shows its accounts as overdue: they were due on 30 September 2025.
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 up £258K (+242.9%) on the year before, to £364K.
- Net assets rose in 8 of 9 year-on-year comparisons on record.
- Current assets of £2.5M against £282K owed within a year: 8.8 times cover.
- 6 employees on average during the year.
- Balance sheets on record for 10 years, 2014 to 2023.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Dec 2023 | £364K | £8,950 | £2.5M | £282K | 6 |
| 31 Dec 2022 | £106K | £41K | £4.2M | £2M | 6 |
| 31 Dec 2021 | £102K | £7,661 | £2.2M | £2.1M | 10 |
| 31 Dec 2020 | £91K | £7,530 | £715K | £584K | 2 |
| 31 Dec 2019 | £83K | £724K | £750K | 4 | |
| 31 Dec 2018 | £55K | £315K | £394K | ||
| 31 Dec 2017 | £60K | £303K | £381K | ||
| 31 Dec 2016 | £51K | £251K | £281K | ||
| 31 Dec 2015 | £47K | £3,199 | £262K | £305K | |
| 31 Dec 2014 | £35K | £23 | £155K | £180K |
Where Simplex Supplies Limited is registered
The registered office is in Doncaster (DN11), in the Doncaster local authority area, Yorkshire and The Humber. Show DN11 9DD on a map.
Other trade companies in DN11
- Dan Nadin Plumbing, Heating & Electrical LimitedElectricians
- Almatuk LtdMechanics and garages
- Cozy Home (Yorkshire) LimitedPlumbers and heating engineers
- HB Aggregates LimitedSpecialist contractors
- J Morgan Renewables LtdElectricians
- Developments (North West) LimitedProperty developers
- Fortress Barrier Solutions LtdInstallers
- S&A Autotek LtdMechanics and garages
Also registered at this address
4 other companies use the same registered office as Simplex Supplies Limited.
- Crane Construction LtdProperty developers
- Givozen LtdProperty developers
- Temorva LtdProperty developers
- Urban Construction LimitedProperty developers
What happens if Simplex Supplies Limited files late
If the accounts reach Companies House today, the late filing penalty is £1,500 (£3,000 if last year's accounts were also late). It rises at each step below.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Oct 2025 to 31 Oct 2025 | £150 |
| 1 to 3 months late | 1 Nov 2025 to 31 Dec 2025 | £375 |
| 3 to 6 months late | 1 Jan 2026 to 31 Mar 2026 | £750 |
| More than 6 months late | From 1 Apr 2026 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jan 2026 | £200 |
| 3 months late | 31 Mar 2026 | another £200 |
| 6 months late | 30 Jun 2026 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Dec 2026 | 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
- 07563454
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 14 March 2011 (15 years ago)
- Registered office
- Loversall Hall Rakes Lane, Loversall, Doncaster, South Yorkshire, DN11 9DD
- Nature of business
- Development of building projects (SIC 41100)
Wholesale of wood, construction materials and sanitary equipment (SIC 46730) - Year end
- 31 December (accounting reference date)
- Accounts type
- Unaudited abridged
- Last accounts made up to
- 31 December 2023
- Last confirmation statement
- 9 January 2026
- Charges (mortgages)
- 1 outstanding of 7 registered
- Previous names
- Wright Removals Limited (until 5 Jul 2018)
Simplex Supplies Ltd (until 5 Jun 2018)
Wright Removals Ltd (until 8 May 2018)
Filing notes for property development companies
Many property development companies are single-project vehicles. Stock of land and buildings sits on the balance sheet as work in progress until sale, and a company that has finished its project may become dormant rather than close.
Similar companies in Doncaster
Other active property development companies registered in Doncaster.
- Six P Projects Limited2022
- Solliset Properties Limited1993
- Spick&Span Group Ltd2025
- Stage 2 Adoptions Ltd2026
- Stanhurst Systems Limited2017
- Stocklink (UK) Limited2002
- Stonedge Property Investments Ltd2026
- Strata Land & Developments Limited1982
All property development companies in Doncaster · All trades in Doncaster · Property developers across the UK
Frequently asked questions
When are Simplex Supplies Limited's accounts due?
Simplex Supplies Limited's accounts were due at Companies House on 30 September 2025 and the register shows them as overdue.
When is Simplex Supplies Limited's CT600 due?
The CT600 for the period to 31 December 2024 is due at HMRC by 31 December 2025, 12 months after the period end. The corporation tax itself is payable earlier, by 1 October 2025.
Is Simplex Supplies Limited still trading?
Simplex Supplies Limited is listed as active on the Companies House register (checked 12 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 Simplex Supplies Limited do?
Simplex Supplies Limited is registered under Development of building projects (SIC 41100); Wholesale of wood, construction materials and sanitary equipment (SIC 46730).
How old is Simplex Supplies Limited?
Simplex Supplies Limited was incorporated on 14 March 2011, 15 years ago.
What is the penalty if Simplex Supplies Limited 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 Simplex Supplies Limited on Companies House for filed documents, officers and the full history.
Based on the Companies House register (snapshot 1 Oct 2026, rechecked 12 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.