CMS Keyholding for London & the South East: a professional keyholding and alarm response company, providing round the clock protection for your premises.

At Banham, we are committed to providing complete security solutions for our clients. For this reason, in 1989 we founded our own Keyholding and Alarm Response company: CMS Keyholding.

CMS Keyholding offers professional Keyholding and Alarm Response services for London and the South East, ensuring that your property is safe while you are away. All of our Key Guards are fully trained and SIA approved. Across London, our emergency and alarm response times are swift, arriving via motorcycle to address any emergency situation.

Our keyholding company will check your property and deal with any situation that arises 24hrs a day, 365 days a year.

CMS Keyholding services

  • Response to Intruder Alarm or Fire Alarm activations
  • Response to gas leaks, floods and power outages
  • Security presence
  • Locked out, keys lost, forgotten or stolen? We can provide access
  • Pet and plant feeding and watering
  • Key duplication

Security Industry Authority logo

CMS Keyholding is approved by the SIA, an independent body responsible for regulating the private security industry which reports to the Home Secretary under the terms of the Private Security Industry Act 2001.

For more information on CMS Keyholding and all the Keyholding and Alarm Response services we can provide, please visit our website:

Alternatively you can call us on 020 7627 0344 or e-mail us at