There are plenty of examples of poor or homeless people being denied bank accounts. It makes a refreshing change for a rich man to suffer this. However, he has NOT been denied a bank account, he's been told that they are closing his Coutts account but he CAN open a new account with Nat West (who own Coutts). I think he should just shut up and accept it like most people would in his situation.
https://news.sky.com/story/nigel-farage-receives-apology-from-coutts-after-bank-account-row-12924414 They've been the bigger man, but still told him to go forth and NatWest.