ASEL

Amberstone Technology Limited, known as ASEL, is a security company with offices in Rochdale, Gateshead and London. It provides its services across the whole of the UK. Its services include manned guarding, key holding and alarm response, and security dog handling. The company also offers retail security, vacant property security and construction site security. It works with the retail sector, Business Improvement Districts (BIDs), and housing providers and landlords.

ASEL's specialisms include data-driven security risk modelling and security leadership for BIDs. The company operates a 24/7 Command and Intelligence Centre. Its subsidiaries hold SIA Approved Contractor status, and the company holds NSI Gold Alarm Receiving Centre accreditation. It is also certified to ISO 9001, ISO 27001 and ISO 14001.