opendata.bot
Company number
02515202

SECURITY DESIGN & DEVELOPMENT LIMITED

Active
✓ Active company on the official register. Next accounts due 30 September 2027.

Company details

East of England, 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
SECURITY DESIGN & DEVELOPMENT LIMITED
Company number
02515202
Registered office
RADIUS HOUSE FIRST FLOOR, 51 CLARENDON ROAD, WATFORD, HERTS, WD17 1HP · 1,069 other companies at this postcode
Company type
Private Limited Company
Incorporated on
25 June 1990
Status
Active
Age
36 years
Nature of business (SIC)
82990 — Other business support service activities n.e.c.
Accounts — next due
30 Sept 2027
Accounts — last made up to
31 Dec 2025
Confirmation statement — next due
27 Aug 2027
Confirmation statement — last
13 Aug 2026

People with significant control

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

Donald James Syme
owns 25–50% of shares · holds 25–50% of voting rights
Notified 06/04/2016
Matthew Charles Dean
owns 75–100% of shares · holds 75–100% of voting rights · can appoint and remove directors
Notified 06/04/2016
Mr John Ingledow
owns 25–50% of shares · holds 25–50% of voting rights
Notified 06/04/2016

Corporate structure

Who controls this company, and who they control in turn

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

Connections

Matthew Charles Dean
born 07/1969 · United Kingdom owns 75–100% of shares · holds 75–100% of votes · can appoint and remove directors Notified 06/04/2016
Donald James Syme
born 05/1953 · United Kingdom owns 25–50% of shares · holds 25–50% of votes Control ended 13/08/2026
Mr John Ingledow
born 04/1951 · United Kingdom owns 25–50% of shares · holds 25–50% of votes Control ended 06/12/2017

Change history

Reconstructed from the dated records Companies House publishes

DateChangeWasNow
13/08/2026 Person with significant control ceased Donald James Syme
06/12/2017 Person with significant control ceased Mr John Ingledow
06/04/2016 Person with significant control added Mr John Ingledow
06/04/2016 Person with significant control added Matthew Charles Dean
06/04/2016 Person with significant control added Donald James Syme

Financial highlights

Parsed from the filed statutory accounts (£ thousands, except employees)

Source: Companies House bulk data filed accounts (iXBRL)
Metric FY2025FY2024
Total assets less current liabilities 17
▲ 23.1%
14
Net assets 17
▲ 23.1%
14
Employees (avg) 3
▼ 25.0%
4

Documents for SECURITY DESIGN & DEVELOPMENT LIMITED

Need this one company on file? Buy the document on its own — no plan required.

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.

PDF Order
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.

PDF + CSV Order
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.

PDF Order

Data protection register

No entry found on the ICO register of fee payers under this name.

Not every organisation has to register — some are exempt. An absent entry is a question to ask, not a finding.

Get this company via API

Every field on this page is available as structured JSON behind one endpoint and one API key.

GET /v1/company/gb/02515202
X-Api-Key: $OPENDATA_KEY
Read the API docs

Frequently asked questions

What is the company number of SECURITY DESIGN & DEVELOPMENT LIMITED?
According to the official registry, the company number of SECURITY DESIGN & DEVELOPMENT LIMITED is 02515202.
Where is SECURITY DESIGN & DEVELOPMENT LIMITED registered?
The registered office is RADIUS HOUSE FIRST FLOOR, 51 CLARENDON ROAD, WATFORD, HERTS, WD17 1HP.
What is the SIC code of SECURITY DESIGN & DEVELOPMENT LIMITED?
The nature of business is recorded under SIC code 82990 — Other business support service activities n.e.c..
Who controls SECURITY DESIGN & DEVELOPMENT LIMITED?
Donald James Syme is recorded as a person with significant control, and owns 25–50% of shares, holds 25–50% of voting rights.
When are the next accounts of SECURITY DESIGN & DEVELOPMENT LIMITED due?
The next annual accounts are due by 30 September 2027, and the last accounts were made up to 31 December 2025.

About SECURITY DESIGN & DEVELOPMENT LIMITED (02515202)

SECURITY DESIGN & DEVELOPMENT LIMITED is a private limited company incorporated on 25 June 1990 and registered in the United Kingdom under company number 02515202. Its registered office is at RADIUS HOUSE FIRST FLOOR, 51 CLARENDON ROAD, WATFORD, HERTS, WD17 1HP. The recorded nature of business is other business support service activities n.e.c. (SIC 82990). The company is currently active , with statutory accounts last made up to 31 December 2025. , and the person with significant control is Donald James Syme. This profile is provided by opendata.bot by Noetikos, aggregating official data from Companies House bulk data , last refreshed 2 September 2026.

Companies at the same registered office

Other business support service activities n.e.c. across UK registers

The same sector and the same company, seen through every register we hold

Explore by sector

Every UK company records what it does as a SIC code — browse the sectors around this one.