Laughing at the knobs that genuinely think London is subsiding the rest of the uk. Might come as a surprise, but Hmrc don't have a different formulation for taxation for Londoners. You pay exactly the same as anyone else, so yes, when far more is spent per head in London, the rest of us are subsidising it.
Successive governments destroying industries in the rest of the uk, while focusing new opportunities on London, plus the reasons given by pps is why London as a whole generates more money. Not by its own virtue.
Plus the fact other areas aren't shipping out their net takers to be housed and funded by other areas. And at the same time the poorer areas lose net contributors because the same government have ensured that's where the highly paid jobs are.
My problem is with the London centric governments, not the residents as a whole. Just those that live in a London bubble and still expect to tell the rest of us how we should think. Or bang on with their ignorant justification as to why London deserves the lions share.
Personally I'd love to see how London intends to feed its residents when it's independent. I'm thinking it would be the perfect revenge for farming, fishing etc to be restored to profitable industries by charging London bloody fortune.