Re: The future...
"traders will go back to the old method: bribery, as far up as needed."
It's fairly clear from the limited evidence that's reached the UK public that bribery, insider trading, and other dubious practices have been generally acceptable to management in the City.
It's less obvious that behaviour like that will be quite so acceptable elsewhere in Europe, given the number of times that City companies have threatened to relocate elsewhere, and yet very few have done so in any meaningful way.