Officer resource is allocated at a BCU level and flexed between the merged boroughs as required to maximise operational effectiveness and efficiency. It is therefore not possible to directly compare the number of officers on individual boroughs.
Merton is part of the South West BCU, along with Richmond, Wandsworth and Kingston. The number of officers on the South West BCU over time can be viewed on the workforce dashboard:
Note there will be officers and staff that deliver services locally on a BCU but are counted in the MPS data centrally. For example, Met Operations.