One of the financial sector’s biggest fears from a UK exit from the European Union is that the free flow of talent into London could be slowed.

There are no reliable figures on how many of the two million Europeans living in the UK are working in London's financial sector but a glance at the big names in investment banking shows how the City has become as international as the Premier League. Manolo Falco, Citigroup's head of corporate and investment banking for Europe, Middle East and Africa, is Spanish, while Diego De Giorgi at Bank of America Merrill Lynch is Italian. Franck Petitgas, Morgan Stanley's co-head of investment banking, is French, as is Thibaut de Roux, head of global markets at HSBC.