I hope it's of interest to some on here, maybe you're even on the buses or know someone. The pic popped up on a Facebook page and the bus experts on there have said it's from 1969.
The old "Busy Bee" transport stop on the A41,North Western Avenue, before taking A409 to approach Wembley through Harrow.
(Transport Cafe long gone,now the site of a Toby Carvery and Watford London Hilton).