@Hebert54 More than a mention. There are always ceremonies held throughout the country to mark the anniversary. There is always a ceremony held in Hawaii to mark the day.
What exactly are you expecting?

@Hebert54 Yes, I think it is. Pearl Harbor happened in Hawaii, which wasn't even a state at the time. It marked the entrance of the US into WWII, and it was basically orchestrated.
Granted, it's likely Britain wouldn't have lasted much longer against Germany without US involvement, but in all honesty, it was the Russians who defeated the Germans on the Western front, and when they began to turn their attention toward the East, Japan knew it was time to surrender. It didn't have as much to do with Truman dropping atomic bombs on Japan, as it did with Russia entering the Pacific part of the War.
To expect it to be recognized in the UK seems a little excessive. However, if it's bothering you that much, call the BBC and tell them as much.

@Hebert54 Yes...it seems such historical events should take the stage instead of all the sensationalized news that have a short life span... so sad...