bus-photo.net - London bus route 13 was originally running between London Bridge and Hendon. By 1950s Hendon-Golders Green section was withdrawn. In 1970 the 13 was cut back from London Bridge to
Boris Johnson's unlucky dirty tricks on the No 13 bus | Westminster Confidential
DART Local Route 13 – SE Park Avenue – DART Local Bus Routes
Does the number 13 bus still cross London? An essay in an old anthology recommended taking it as the best way to see London, better than sightseeing buses. - Quora
CLondoner92: Bus types revealed for new London Bus routes - 13, 360 and 388