I cannot say which of the two sets of arguments is stronger, the economic or the political ones, but what I can say is that Europe needs a more European UK as much as the UK needs a more British Europe.
To limit myself to matters that are close to my own professional capacity, let me note a few reminders of the depth of the interconnection: More than twice as many euros are traded in the UK’s foreign exchange market as in all the countries of the euro area combined and more than in the US.