In the 1960s, the southernmost section between Chessington Zoo and Leatherhead was withdrawn and replaced by route 71. In 1975, the elderly AEC Regent III RT were replaced by AEC Routemasters, and the route extended from Chessington Zoo to Chessington Fox & Hounds during Monday to Friday peak hours.[4]
In February 1979, the route was temporarily split in two in Petersham, due to a large sinkhole nicknamed the 'Petersham Hole'. Regular through service did not resume until September 1980.[5]
In 1984, the northern section to Argyle Road was cut back to Ealing Broadway. In 1985, the 65 was converted to one-person operation using MCW Metrobuses, all based at Norbiton.[4] In 1987, the route was reduced further, with the southern portion of the route to Chessington cut back to Kingston. By this time, route tendering had been established in London, and 65 passed to Kingston Bus, a low-cost unit established by London Buses.[4]
Armchair finally took over in January 1991, using a batch of seventeen Leyland Olympians plus three second-hand Atlanteans.[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. A variety of other buses worked the route during Armchair's tenure, including Alexander bodied Leyland Olympians after Armchair lost route 260, two MCW Metrobuses new to East Kent Road Car Company.[7]
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.[9] London United retained the route when next tendered with the new contract to commence on 2 July 2016.[10]