The councils of the London boroughs of: Barking and Dagenham, Camden, Hackney, Hammersmith and Fulham, Havering, Islington, Newham, and Waltham Forest

Ashford Borough Council

Dartford Borough Council

Dover District Council

Essex County Council

Gravesham Borough Council

Kent County Council

Maidstone Borough Council

Rochester-upon-Medway City Council

Sevenoaks District Council

Shepway District Council

Thanet District Council

Thurrock Borough Council

Tonbridge and Malling Borough Council