Iidiagnostics Limited company overview
Iidiagnostics Limited is a private limited company registered with company number 05437997. It was incorporated on 27 Apr 2005 and its current status is active.
The registered office is at School Of Tropical Medicine, Pembroke Place, Liverpool, Merseyside, L3 5QA. The company has 5 active officers. It was previously called Echitab Study Group (UK) Limited.
Iidiagnostics Limited upcoming deadlines
Year end accounts
Due 30 Apr 2027
Confirmation statement
Due 9 Apr 2027
Corporation tax payment
Due 1 May 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.
Iidiagnostics Limited at a glance
21 years
Trading age
7,869 days since incorporation
5
Active officers
David, Janet,, Hilary, Joanne
69
Filings on record
Latest: 2 Apr 2026
100/100
Filing health score
Accounts and statement up to date
Directors of Iidiagnostics Limited
Former officers
Nature of business (SIC codes)
72200
Research and experimental development on social sciences and humanities
Allowable expenses for Iidiagnostics Limited
Based on Iidiagnostics Limited's SIC code (72200), these are typical tax-deductible expenses for a professional & creative services company. Claiming them lowers the profit you pay corporation tax on.
Design tools & equipment
Creative software, cameras, drawing tablets and props.
Professional memberships
HMRC-approved professional body subscriptions.
Business travel
Trains, flights, hotels and subsistence for client work.
Working from home
A share of household bills or the £6-a-week flat rate.
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 Iidiagnostics Limited
How much tax does a professional & creative services 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 Iidiagnostics 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 Merseyside?
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 Iidiagnostics 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
2 Apr 2026 · TM01
Termination of appointment of Duncan Richard Preston as a director on 27 Mar 2026
26 Mar 2026 · CS01
Confirmation statement made on 26 Mar 2026 with no updates
2 Mar 2026 · AA
Small accounts made up to 31 Jul 2025
11 Apr 2025 · CS01
Confirmation statement made on 31 Mar 2025 with no updates
7 Apr 2025 · AA
Small accounts made up to 31 Jul 2024
5 Sep 2024 · TM01
Termination of appointment of Robert Einion Holland as a director on 1 Sep 2024
5 Sep 2024 · TM02
Termination of appointment of Robert Einion Holland as a secretary on 1 Sep 2024
5 Sep 2024 · AP03
Appointment of Joanne Louise Clague as a secretary on 1 Sep 2024
5 Sep 2024 · AP01
Appointment of Mrs Joanne Louise Clague as a director on 1 Sep 2024
2 Apr 2024 · CS01
Confirmation statement made on 31 Mar 2024 with no updates
14 Mar 2024 · AA
Small accounts made up to 31 Jul 2023
3 Apr 2023 · CS01
Confirmation statement made on 31 Mar 2023 with no updates
19 Jan 2023 · AA
Small accounts made up to 31 Jul 2022
5 Oct 2022 · AP01
Appointment of Mr Duncan Richard Preston as a director on 7 Sep 2022
31 Mar 2022 · CS01
Confirmation statement made on 31 Mar 2022 with no updates
8 Jan 2022 · AA
Dormant accounts made up to 31 Jul 2021
6 Dec 2021 · AP01
Appointment of Prof Hilary Anne Ranson as a director on 25 Nov 2021
6 Dec 2021 · AP01
Appointment of Prof Janet Hemingway as a director on 25 Nov 2021
3 Dec 2021 · CERTNM
Certificate change of name company
6 Apr 2021 · CS01
Confirmation statement made on 2 Apr 2021 with no updates
Showing the latest 20 of 69 filings. See the full history on Companies House
Accounting services for Iidiagnostics Limited
From tax to payroll, find accountants who look after every part of Iidiagnostics 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 Iidiagnostics Limited
About Iidiagnostics Limited
Iidiagnostics Limited is a UK private limited company based in Merseyside, registered at Companies House as company number 05437997 since 27 Apr 2005. Its listed activities include research and experimental development on social sciences and humanities. This page brings together its public record — directors, registered office, nature of business and filing history — in one easy place.
Iidiagnostics Limited filings and compliance
Every UK limited company must file annual accounts, a confirmation statement and a corporation tax return each year. Iidiagnostics Limited has 69 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 Merseyside?
Businesses like Iidiagnostics Limited often use a local accountant for year-end accounts, corporation tax, VAT and payroll. Compare fixed-fee, regulated accountants near Merseyside and get free quotes in minutes.
This page shows public information from Companies House. Director of Iidiagnostics Limited?
Iidiagnostics Limited – frequently asked questions
What is the company number of Iidiagnostics Limited?
Iidiagnostics Limited is registered at Companies House under company number 05437997.
When was Iidiagnostics Limited incorporated?
Iidiagnostics Limited was incorporated on 27 Apr 2005 as a private limited company.
Who are the directors of Iidiagnostics Limited?
Current officers are David Griffith, Professor Lalloo (director), Janet, Prof Hemingway (director), Hilary Anne, Prof Ranson (director), Joanne Louise Clague (secretary) and Joanne Louise Clague (director).
What does Iidiagnostics Limited do?
The company's registered nature of business (SIC) is 72200 – Research and experimental development on social sciences and humanities.
Where is Iidiagnostics Limited registered?
The registered office address is School Of Tropical Medicine, Pembroke Place, Liverpool, Merseyside, L3 5QA.
Is Iidiagnostics Limited still trading?
According to its latest Companies House record the company status is active. Its most recent filing was termination of appointment of Duncan Richard Preston as a director on 27 Mar 2026 on 2 Apr 2026.