Erik,
You assume that a UK Tory party beholden to the banking community can negotiate a deal which the rest of the country outside London can live with. But the Tories cannot negotiate - precisely because in the negotiation the other party can obtain whatever it wants as long as it grants the banks passporting. So leave will really need to mean leave - or a deal that is very very bad for anyone not in the financial industry.
Edmund
Ah Edmund, the eternal protesting student!
Get real: The City is the biggest earner we have in the UK; the rest of Europe is already wooing every banker, wanker and shark for their business. Why, because it likes them? Nope because of the wealth they bring flooding in. What London has is gravitas, history and expertise. Unfortunately, expertise is the part that does the work; it can be bribed to go just about anywhere. Make it difficult for it to operate, and it will do exactly that: vanish next door.
What exists outside London, and I presume London, to you, means the world of money, has always existed exactly where it finds itself today. Much of it, especially northwards into the industrial belts, made its way via industries that originated there and eventually died either naturally as they became redundant through new inventions, or through left-wing sabotage coupled with the work ethic that still existed in many countries that took over from the UK producers. You cannot beat the reality of low-wage economies outquoting everything that an established 1st world country can offer in the marketplace.
As to why you believe that a deal good for the City will automatically be bad for the rest of Britain is beyond me: I think everything that's bad for the City is going to be a million times as bad for the rest. Don't forget: the City (as in its people) can move at any time it chooses; that's why it's being wooed!. The rest of the population could, but under Brexit will no longer be able so to do
just because it feels like it. Again, the wheat and the chaff: the wheat will always be sought after and offered jobs, regardless of nationality.