When Richard II was imprisoned and died in custody on his return to England, Queen Isabella was ordered by the new King Henry IV to move out of Windsor Castle and to settle in the Bishop of Salisbury's Thameside palace at Sonning.
In January 2009, the route was taken over by East London Bus Group (now Stagecoach London), who currently operate it with seven Alexander Dennis Enviro200 single-deckers from their Thameside subsidiary's garage in Rainham.