Wandering home from school, through Ealing, one late afternoon in 1972 or 1973, I came across a BBC camera crew and the Monty Python team, filming
Climbing the North Face of the Uxbridge Road. Despite the title, I'm pretty sure it was North Ealing Road, or possibly South Ealing Road -- it was a long time ago.
I just rewatched the sketch for the first time in 44 years or so. Worth 1 minute 48 of anyone's time --
https://www.youtube.com/watch?v=9U0tDU37q2M
Edited -- just noticed the comments under the video -- South Ealing Road, apparently.