I'm still trying to confirm beyond reasonable doubt that in the late 1960's Hamleys was at perhaps 200-204 Regent Street and Galeries Lafayette was at 188-196. I'm sure that a 1970 London telephone directory, or similar, would be the easiest way to confirm this, but not having access to one...
I've taken another screenshot of that YouTube video at around 47:10, and cut just a portion of it showing just the shop signs that I'm puzzling over. I've annotated it too with my queries.
I assume that there will be no copyright problems with this, and no reason for a moderator to remove it?
This annotated picture makes me chuckle as it puts me in mind of people's annotated and selectively highlighted/sharpened/modified NASA Mars images showing 'clear evidence of life on mars'. I make no such claims here - all my annotations are just educated guesswork, except for the Galeries Lafayette sign which is 100% certain for the reason stated.