Barroso says UK demand put EU internal market at risk
Of course it wouldn't and it never did. What the British veto did stop was a Europe wide Tobin tax that would have destroyed the London markets as all the business there moved to Switzerland, Hong Kong, Singapore, New York or Dubai.
But you can tell who the real losers are by their anger: the EU politicians who thought they would be onto a nice little earner (they wouldn't).
In fact London is the most open market in the world, which is why it is the most established international market for trading of foreign currency and Eurobonds and a whole lot of commodities, but rather than being regulated by the bureaucrats of Brussels, it takes a more worldly view with its banking regulatory norms agreed in Basel with the entire world community, not some power crazed nation barely 65 years on from its seven figure bout of ethnic cleansing.