Welcome to The Fintech Files, keeping you up-to-date with the latest developments in financial tech and innovation. Regular host Yolanda Bobeldijk is on maternity leave, so this week's edition is brought to you by Samuel Agini, FN's trading & technology correspondent.

Behind the scenes at Citi’s innovation lab
Fintech types gave a united sigh of relief last month when Citigroup revealed plans for a new innovation lab in London. What a great boost to the City’s fintech scene ahead of Brexit, they cooed. Especially given concerns that leaving the EU could damage London’s ability to attract talent. But what happens in an innovation lab anyway?