The financial service sector contributed over £128 billion to the economy last year, and accounted for over 2.2 million jobs across the country. It also paid £71.4 billion in tax in 2015. It's thought Theresa May needs a transitional deal in order to give the sector time to adapt to life outside the EU. James Brydges spoke to Mark Boleat, Policy Chairman of the City of London Corporation, and first asked whether there were any surprises in the letter to Donald Tusk.