Smiths Detection-Watford Limited company overview
Smiths Detection-Watford Limited is a private limited company registered with company number 00480992. It was incorporated on 14 Apr 1950 and its current status is active.
The registered office is at Century House, Maylands Avenue, Hemel Hempstead, Hertfordshire, HP2 7DE. The company has 4 active officers. It was previously called Graseby Dynamics Limited and 1 other name.
Smiths Detection-Watford Limited upcoming deadlines
Year end accounts
Due 30 Sep 2027
Confirmation statement
Due 4 Jul 2027
Corporation tax payment
Due 1 Oct 2027
Dates are the ones Companies House holds for this company. Late accounts trigger automatic Companies House penalties starting at £150, and HMRC charges interest on late corporation tax.
Smiths Detection-Watford Limited at a glance
76 years
Trading age
27,970 days since incorporation
4
Active officers
Richard, Suzanne, Sarah, Nicola
209
Filings on record
Latest: 3 Nov 2026
100/100
Filing health score
Accounts and statement up to date
Directors of Smiths Detection-Watford Limited
Former officers
26 more officers are on the register. See all on Companies House
Nature of business (SIC codes)
26511
Manufacture of electronic measuring, testing etc. equipment, not for industrial process control
Allowable expenses for Smiths Detection-Watford Limited
Based on Smiths Detection-Watford Limited's SIC code (26511), these are typical tax-deductible expenses for a manufacturing company. Claiming them lowers the profit you pay corporation tax on.
Raw materials
Materials and components used to make your products.
Machinery & tools
Equipment purchases — often 100% relief via the Annual Investment Allowance.
Workshop costs
Rent, rates, heating and electricity for premises.
Vehicle & mileage
45p a mile for the first 10,000 business miles in a personal car.
Staff & director salaries
Wages, employer NI and pension contributions paid through PAYE.
Accountancy & legal fees
Bookkeeping, year-end accounts, tax advice and company secretarial costs.
Business insurance
Public liability, professional indemnity and employer's liability cover.
Phone & internet
Business mobile contracts, broadband and a share of home internet.
General guidance only — every expense must be wholly and exclusively for business. Ask an accountant
Tax guide for businesses like Smiths Detection-Watford Limited
How much tax does a manufacturing company pay?
UK companies pay corporation tax at 19% on profits up to £50,000, rising to 25% above £250,000, with marginal relief in between. Claiming every allowable expense reduces taxable profit.
Does a company like Smiths Detection-Watford Limited need to register for VAT?
VAT registration is compulsory once taxable turnover passes £90,000 in any rolling 12 months. Many businesses register voluntarily to reclaim VAT on costs.
How much does an accountant cost for a limited company in Hertfordshire?
Fixed-fee accountants typically charge £60–£200 a month for a small limited company, covering year-end accounts, corporation tax and the confirmation statement.
Can directors of Smiths Detection-Watford Limited pay themselves in dividends?
Most small company directors take a low salary plus dividends. Dividends are paid from profits after corporation tax, with an annual £500 dividend allowance.
Filing history
3 Nov 2026 · MR01
Mortgage create with deed with charge number charge creation date
4 Sep 2026 · AA01
Change account reference date company current extended
10 Jul 2026 · CS01
Confirmation statement made on 20 Jun 2026 with no updates
25 Jun 2026 · AP01
Appointment of Sarah Jane Robinson as a director on 22 Jun 2026
24 Jun 2026 · AP01
Appointment of Nicola Talbot as a director on 23 Jun 2026
23 Jun 2026 · AP01
Appointment of Suzanne Elizabeth Carter as a director on 17 Jun 2026
23 Jun 2026 · TM01
Termination of appointment of Alastair Campbell Irvine as a director on 17 Jun 2026
10 May 2026 · AA
Full accounts made up to 31 Jul 2025
20 Jun 2025 · CS01
Confirmation statement made on 20 Jun 2025 with no updates
9 Apr 2025 · AA
Full accounts made up to 31 Jul 2024
21 Jun 2024 · CS01
Confirmation statement made on 20 Jun 2024 with no updates
5 Jan 2024 · AA
Full accounts made up to 31 Jul 2023
3 Jul 2023 · CS01
Confirmation statement made on 20 Jun 2023 with no updates
7 Mar 2023 · AA
Full accounts made up to 31 Jul 2022
23 Jun 2022 · CS01
Confirmation statement made on 21 Jun 2022 with no updates
12 Jan 2022 · AA
Full accounts made up to 31 Jul 2021
13 Jul 2021 · TM01
Termination of appointment of Liam Peter King as a director on 9 Jul 2021
13 Jul 2021 · AP01
Appointment of Mr Alastair Campbell Irvine as a director on 9 Jul 2021
5 Jul 2021 · AA
Full accounts made up to 31 Jul 2020
5 Jul 2021 · CS01
Confirmation statement made on 21 Jun 2021 with no updates
Showing the latest 20 of 209 filings. See the full history on Companies House
Accounting services for Smiths Detection-Watford Limited
From tax to payroll, find accountants who look after every part of Smiths Detection-Watford Limited’s finances.
Year-end accounts
Statutory accounts prepared and filed with Companies House on time, every year.
Corporation tax
CT600 returns filed with HMRC and tax planned so you only pay what you owe.
Payroll
Pay your team on time every month, with RTI submissions and pensions handled.
VAT & bookkeeping
Keep your books tidy and your VAT returns MTD-ready all year round.
Confirmation statement
Your annual confirmation statement checked and filed before the deadline.
Management accounts
Monthly or quarterly reports so you can see how the business is really doing.
More about Smiths Detection-Watford Limited
About Smiths Detection-Watford Limited
Smiths Detection-Watford Limited is a UK private limited company based in Hertfordshire, registered at Companies House as company number 00480992 since 14 Apr 1950. Its listed activities include manufacture of electronic measuring, testing etc. equipment, not for industrial process control. This page brings together its public record — directors, registered office, nature of business and filing history — in one easy place.
Smiths Detection-Watford Limited filings and compliance
Every UK limited company must file annual accounts, a confirmation statement and a corporation tax return each year. Smiths Detection-Watford Limited has 209 filings on record. Keeping on top of these deadlines avoids automatic penalties from Companies House and HMRC, which start at £150 for late accounts.
Looking for an accountant in Hertfordshire?
Businesses like Smiths Detection-Watford Limited often use a local accountant for year-end accounts, corporation tax, VAT and payroll. Compare fixed-fee, regulated accountants near Hertfordshire and get free quotes in minutes.
This page shows public information from Companies House. Director of Smiths Detection-Watford Limited?
Smiths Detection-Watford Limited – frequently asked questions
What is the company number of Smiths Detection-Watford Limited?
Smiths Detection-Watford Limited is registered at Companies House under company number 00480992.
When was Smiths Detection-Watford Limited incorporated?
Smiths Detection-Watford Limited was incorporated on 14 Apr 1950 as a private limited company.
Who are the directors of Smiths Detection-Watford Limited?
Current officers are Richard Edward Thompson (director), Suzanne Elizabeth Carter (director), Sarah Jane Robinson (director) and Nicola Talbot (director).
What does Smiths Detection-Watford Limited do?
The company's registered nature of business (SIC) is 26511 – Manufacture of electronic measuring, testing etc. equipment, not for industrial process control.
Where is Smiths Detection-Watford Limited registered?
The registered office address is Century House, Maylands Avenue, Hemel Hempstead, Hertfordshire, HP2 7DE.
Is Smiths Detection-Watford Limited still trading?
According to its latest Companies House record the company status is active. Its most recent filing was mortgage create with deed with charge number charge creation date on 3 Nov 2026.