the head of the london stock exchange group. david schwimmer. you on the show. and david, let me start with you, because you've been at the helm of right here the london stock exchange group for some five years at a time that's been well characterised by some pretty, pretty big strategic challenges. one of them, of course, brexit, which has had a huge impact on many of your customers. what impact has that had on on your business? it has not had a dramatic impact on our business. there were some big questions about a few different parts of the business. we moved some trading of european domiciled equities to amsterdam and that's worked fine. we have had a lot of questions about clearing, and the clearing of interest rate swaps, and the eu's desire to have that moved from london to the eu. but our customers didn't want to do that. so we have been consistent throughout the process of really doing what our customers wanted to do. we continue to work with the eu. this is actually an issue. here we are. seven years after the brexit vote. and this clea