opendata.bot
Company number
16770895

DIAMAIR SYSTEMS LIMITED

Active
✓ Active company on the official register. Next accounts due 8 July 2027.

Company details

London, England Contains OS data © Crown copyright and database right. Contains Royal Mail data © Royal Mail copyright and database right. Source: Office for National Statistics licensed under the Open Government Licence v.3.0.
Registered name
DIAMAIR SYSTEMS LIMITED
Company number
16770895
Registered office
55 LOUDOUN ROAD, LONDON, NW8 0DL, ENGLAND · 874 other companies at this postcode
Company type
Private Limited Company
Incorporated on
8 October 2025
Status
Active
Age
0 years
Nature of business (SIC)
62012 — Business and domestic software development
Accounts — next due
08 Jul 2027
Confirmation statement — next due
21 Oct 2026

What the register says

Facts from the register, with the dates they are filed under. Not a score: what they mean is for you to judge, and every line can be checked against Companies House itself.

Companies House register snapshot, read 02/09/2026.

People with significant control

Beneficial owners holding over 25% of shares, voting rights or the right to appoint directors

Mr Alan Leslie
owns 75–100% of shares · holds 75–100% of voting rights · can appoint and remove directors
Notified 08/10/2025
Mr James Daniel Leslie
owns 75–100% of shares · holds 75–100% of voting rights · can appoint and remove directors
Notified 19/08/2026

Corporate structure

Who controls this company, and who they control in turn

2 controllers Drag to move · scroll to zoom · double-click to expand
Company Person Current control Ended

Connections

Mr James Daniel Leslie
born 11/1999 · England owns 75–100% of shares · holds 75–100% of votes · can appoint and remove directors Notified 19/08/2026 Controls 2 companies
Mr Alan Leslie
born 11/1964 · England owns 75–100% of shares · holds 75–100% of votes · can appoint and remove directors Control ended 19/08/2026 Controls 7 companies

Change history

Reconstructed from the dated records Companies House publishes

DateChangeWasNow
19/08/2026 Person with significant control ceased Mr Alan Leslie
19/08/2026 Person with significant control added Mr James Daniel Leslie
08/10/2025 Person with significant control added Mr Alan Leslie

Documents for DIAMAIR SYSTEMS LIMITED

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Company extract£1.99

The full registration record as held today — name, number, status, registered office, company type, previous names, officers, PSC and SIC codes, timestamped for your file.

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Financial statements£3.99

Every figure the company’s own accounts state, across each filed period, with year-on-year movement. Most UK companies file small or micro-entity accounts — a balance sheet and a headcount, no turnover or profit.

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Ownership report£3.99

Who controls the company: persons with significant control, the nature of that control, the ownership graph and every other company those controllers hold.

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Data protection register

Registered with the Information Commissioner's Office as a data protection fee payer.

Diamair Systems Limited — NW8 0DL
Trading as Diamair
Tier 1 · renews 20/07/2027
ICO entry

The ICO publishes no company number, so this is matched on the registered name and confirmed by the postcode. Check the ICO entry before relying on it.

Get this company via API

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GET /v1/company/gb/16770895
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Read the API docs

Frequently asked questions

What is the company number of DIAMAIR SYSTEMS LIMITED?
According to the official registry, the company number of DIAMAIR SYSTEMS LIMITED is 16770895.
Where is DIAMAIR SYSTEMS LIMITED registered?
The registered office is 55 LOUDOUN ROAD, LONDON, NW8 0DL, ENGLAND.
What is the SIC code of DIAMAIR SYSTEMS LIMITED?
The nature of business is recorded under SIC code 62012 — Business and domestic software development.
Who controls DIAMAIR SYSTEMS LIMITED?
Mr Alan Leslie is recorded as a person with significant control, and owns 75–100% of shares, holds 75–100% of voting rights, can appoint and remove directors.
When are the next accounts of DIAMAIR SYSTEMS LIMITED due?
The next annual accounts are due by 8 July 2027.

About DIAMAIR SYSTEMS LIMITED (16770895)

DIAMAIR SYSTEMS LIMITED is a private limited company incorporated on 8 October 2025 and registered in the United Kingdom under company number 16770895. Its registered office is at 55 LOUDOUN ROAD, LONDON, NW8 0DL, ENGLAND. The recorded nature of business is business and domestic software development (SIC 62012). The company is currently active . , and the person with significant control is Mr Alan Leslie. This profile is provided by opendata.bot by Noetikos, aggregating official data from Companies House bulk data , last refreshed 2 September 2026.

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