Well, I was correct in my prediction that the Ant & Dec appearance would be a blink-and-you-miss-me affair. Although we spent more than an hour giving them spelling and Scrabble tips, my contribution was edited down to "Hi, I'm Lynne" and "Yes, that's a word" (or something like that). I don't have a good history with ITV.
But the show had a wealth of jokes that wouldn't work in AmE, so I amused myself with noticing them--for instance, Dec's double-entendre at the start about about having it off--where "it" could have been his leg, or (BrE) he could have been claiming to have had sex with the "nurses" who accompanied him on stage. Then there was the skit/game called Court in the Act, which works much better as a pun in BrE than it would in AmE.
But the richest bit (from my perspective) was Dec almost losing the spelling bee (forcing the competition into 'sudden death') because he used the AmE spelling of diarrhea. Susie Dent, the dictionary expert (of Countdown fame), merely told him that the 'correct' spelling was diarrhoea, without mentioning the AmE connection. A lost opportunity, I thought. But still, at least it's topical as far as this blog is concerned. Also did you (who watched it) notice that Ant and Dec are both haitch-sayers? Is this a Geordie (Newcastle-dialect) thing, do you think, or Catholic upbringing? (Only Dec went to Catholic school, though, according to this source.)