It really won’t be, central London has changed immeasurably due to development. The parts that haven’t changed are mainly in The City, which wouldn’t really have featured in photos from the ‘60s. As to it ever swinging, well, I grew up in London in the ‘60s, it was fairly meh. That said, living and working there until recently, every decade was meh from a fashion and cultural perspective, just same old, same old with less flared trousers.
After 30 years of working and commuting to central London from South London, I can understand that. We moved 500+ miles north in 2020, to a rural location and when we went back down to visit friends, I couldn’t wait to get back to my new home. I never had me down as a country mouse, but that’s what I am.
Another thing about London and the Home Counties is that, at least from my experience, it’s rubbish for live music at the pub/club level. Getting gigs is ridiculously hard and the monetary rewards piffling. Things are much better away from that conurbation (I wonder if it’s the same for Manchester, Birmingham and the like?).