Support and Maintenance for MPS Electronic Security Services (ESS)

a) The ongoing support and maintenance of the current ESS portfolio, which includes corporate access, control (EBACS), estate-related surveillance systems (CCTV) and estate-related alarm and intruder detection systems. b) The ongoing support and maintenance of the external alarm systems used by the Parliamentary and Diplomatic Protection Group to protect diplomatic properties across Greater London, known as the Embassy Warning System, or 'EWS'.