In which area would you like to work later?
From what I've read, the common route is to start working in Europe after a degree in Europe, and US banks don't really recruit from European universities. If you'd like to work in London you can either study in the UK at target unis such as Oxford, LSE(try the Accounting & Finance course though), Imperial, Warwick or Cambridge and LBS( which both require work experience), although I think your chances at those schools are not that good, or you could study at universities like Bocconi, SSE, Rotterdam and some other, which also place well in London(from what I've heard). I think you would have way better chances at the latter unis. Relevant internships also increase your chances in those programs.