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Guide

How To Choose A Security Company In The UK

Nine questions that separate a reliable security supplier from a risky one, whether you need one officer on a door or a full team for an event.

How To Choose A Security Company In The UK

By RMSS LTD · Updated 25 October 2026

Security is a service you rely on when something goes wrong, so it is worth checking a supplier before you need it. Use this checklist when you compare companies.

1. Check Whether They Are An SIA Approved Contractor

The Security Industry Authority runs the Approved Contractor Scheme. It is voluntary, and companies that join are assessed against independent standards and inspected. Approval is for specific activities, such as security guarding, so check the register to see what a company is approved for. You can read the SIA's own description of the scheme on GOV.UK, and see how to check ours on our SIA Approved Contractor page.

2. Ask How They Check Officers' SIA Licences

Anyone doing licensable work, such as security guarding or door supervision, must hold the right SIA licence. Ask how the company checks licences, how often, and whether you can see the licence numbers of the officers it will send. Our guide explains how to check a security guard's SIA licence.

3. Look For Recognised Certification

Independent certification shows that a company is audited, not just self declared. Examples include ISO 9001 for quality management and SafeContractor for health and safety. We hold both, are RISQS verified and are registered with the Information Commissioner's Office.

4. Confirm The Insurance

Ask for proof of public liability and employers' liability insurance, and check the level of cover suits your site or event.

5. Ask About Training And Briefings

Licence training is the minimum. Ask about site specific induction, briefings before each shift or event, and refresher training for the team.

6. Understand Supervision And Cover

Who supervises the officers, how often do they visit and who do you call at night? Ask what happens if an officer is ill or does not arrive.

7. Ask For References And Case Studies

A good supplier can show work for clients like you. For example, our work at Wembley Stadium is described in our Wembley Stadium case study.

8. Get A Clear, Itemised Quote

The quote should show the hours, the number and type of officers, the rates, and what is and is not included. A price that looks far lower than the others deserves questions, because wages, training and licence checks are where costs get cut.

9. Check Reporting And Communication

You should know what you will receive after each shift or event, and who your single point of contact is.

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Questions

Frequently Asked Questions

How much does a security company cost?

It depends on the hours, the number of officers, the licences needed, the risk and how much notice you give. Ask for an itemised quote so you can compare like with like.

Is the Approved Contractor Scheme compulsory?

No. It is voluntary, which is why it is a useful signal. Companies that join are assessed and inspected by the SIA's assessors against independent standards.

What should a security contract include?

The duties and hours, the number and type of officers, the assignment instructions, the rates, insurance, how absence is covered, reporting, and how either side can end the contract.

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