Running between Ealing Broadway station and Kingston upon Thames, it is operated by RATP Dev Transit London.

However a delay in the delivery of new buses resulted in London & Country operating it for a few months from 29 September 1990, mainly using Leyland Atlanteans from distant Croydon and Leatherhead garages.

[6] It retained the route upon it being re-tendered in 1996, and subsequently replaced the ageing Atlanteans with new Northern Counties Palatine II bodied Volvo Olympians.

[7] Upon being re-tendered, the route passed to London United on 29 June 2002 with new Alexander ALX400 bodied Dennis Trident 2s from Fulwell garage.

[8] Upon being re-tendered, it was retained by London United with a new contract commencing on 4 July 2009, that saw the section between Kingston and Chessington reinstated for night-time services only.