[Toy Soldier]

TBH I think "selfishly" the main reason the UK needs to care at the moment is that we're already in a minefield with post-Brexit stuff and, ideally, we want to be dealing with a half-way-sensible US administration when hammering this stuff out. Don't get me wrong - I think the US has us over a barrel with trade either way - but Trump is volatile and unpredictable and will happily offer and then snatch back deals based on other political events. "Well I know we had a great deal on the table but you didn't support us with [X, Y, Z] so forget it" will be constant under Trump.