That particular group were called “The Fool”. They were costume designers whose clients included the Beatles.
eta: https://en.m.wikipedia.org/wiki/The_Fool_(design_collective)
Granny Takes A Trip, mate!
Weren’t they also called dandies during that time?
There has been a tradition… or more like a sub-current, of eccentric clothing in London that reaches back until at least the days of Queen Victoria.
Granted, the 1960s took it up a notch or three.Yes. This is a British group. Carnaby Row was the centre for that style of design. cf. Austin Powers.
In America, this got lumped in as “Mod”, despite that word having a more specific meaning (sharp suits taking cues from Italian tailoring).
Were Mods an American thing as well?
Fashion: grifting since time immemorial.