Richard, were you able to keep your UK account with a US address, or do you retain an address in the UK? I'm asking because I will shortly be giving up my address in Denmark on which my UK-issued Platinum IDC is based. I've heard from others that their IDC was cancelled when they tried to file a U.S. change of address on the account. I'm still debating whether or not I want to keep it, but the travel/medical insurance and rental car coverage is superior to the U.S. card, plus we get the additional cards free and two Priority Passes (not 'Select'), etc.