Question to the Department for Transport:

To ask the Secretary of State for Transport, how many British Transport Police officers worked on the Southern Rail network in each of the last eight years.

The British Transport Police does not allocate officers exclusively to specific parts of the network. Train Operating Companies each contribute a share of the overall costs of policing the railway network through a Police Service Agreement (PSA) with BTP. The PSA does not specify or allocate officers to a particular PSA holder or area and it is the responsibility of the Chief Constable of BTP to determine the level of policing across the rail network as a whole.