Car driven by Dennis Price?

Looks like an Isetta. There is a whole page devoted to the Isetta used in that movie at: http://www.imcdb.org/movie.php?id=50749PHPSESSID=5d5b66bb48a5415300369c97e3b393be

It's a BMW version of the Isetta: http://en.wikipedia.org/wiki/BMW_Isetta#BMW_Isetta_.28Germany.29

A "Bubble Car"



I was walking down the skyway my way...

It's a UK made BMW Isetta 300 https://en.wikipedia.org/wiki/Isetta#BMW_Isetta_.28United_Kingdom.29 - not the German one someone else pointed to. You can tell as it has right side steering and the door hinges are on the right as well.

Oh, and the chaps at BBC's "Top Gear" gave it a spin: https://www.youtube.com/watch?v=pwDZqAW8M4I