| Name | Area |
|---|---|
| North-east London area | The London boroughs of Barking, Havering, Newham, Redbridge and Waltham Forest. |
| South-east London area | The London boroughs of Bexley, Bromley and Croydon. |
| South-west London area | The London boroughs of Kingston upon Thames, Merton, Richmond upon Thames and Sutton. |
| Middlesex area | The London boroughs of Barnet, Brent, Ealing, Enfield, Haringey, Harrow, Hillingdon and Hounslow. |