I'm an American naval officer attending a charity function with my fiancee, a Brit, in July in the UK. The event is black tie. I plan to wear mess dress defined as Dinner Dress Blue Jacket for us without any medals. Am I making the right choice? We would normally wear a white jacket for a summer function, but I'm thinking that you guys typically don't wear whites in the UK. We would also wear the medals, but I'm thinking for a civilian function such would be a bit to much. Thanks for any advice.