@devilish
Some very eccentric posts there.
Why would other European nations be 'hostile' to Britain if it left the EU. Are they hostile to Switzerland?
London's status as a world financial center dates from the days of the British Empire. It's certainly not a consequence of EU membership.
Britain's importance in Europe is more or less proportional to the size of its economy. It's got little to do with being one voice out of 28 in the EU's sclerotic decision making mechanisms. Within or outside the EU, Britain will continue to play a significant role in European and World affairs.