[henvic]

Looks like this was the bus: https://i1.wp.com/www.techtraveleat.com/wp-content/uploads/2...

From a link I found in Wikipedia: https://www.techtraveleat.com/story-of-london-culcutta-bus-s...

https://www.shutterstock.com/editorial/search/london-to-calc...

[ac29]

Love the advertisement for British Overseas Airways Corporation on the bus: "Next time we'll fly"