The UK was, and to some senses still is, a culture that strongly values who your parents are vs what you’ve personally accomplished. The head of state is the child of the previous head of state. The House of Lords is still a thing. Prestige based on family lineage is considered a big deal. In the US and other parts of Europe it’s very different. People value you a lot more because of what you’ve done vs who you are a…
Maybe on individual level, but as far as economy goes, mainland EU is still stuck with very old corporations and rarely generates some interesting startup (not just in IT). There has been a notable dearth of new European corporations since the 1970s at least. The old guard controls everything.
And London is full of European youngsters who came there to study and do some business, because the possibilities are broader there, including some VC culture. Try founding a new company in Germany; you will be met by a merciless paper storm that can only be weathered with help of a professional specialized in dealing with bureaucracy, and may take several months to overcome.
The UK is too complicated to fit into one neat box. It has its peers in medieval gowns, but at the same time, London is a very modern 21st century city, more modern than many metropolises on the continent. Perhaps Warsaw is more modern than London.