There was an advert years ago, I know it had Fry and Laurie in it, they might have been playing Jeeves and Wooster. I remember they were acting posh, and at the end one of them asks the other if he would like 'choccy topping'. It's driving me up the wall that I can't remember what it was for, or what the choccy topping was all about!
It was part of a series for the Alliance and Leicester, I think. That one had two boys playing the roles with Fry and Laurie's voices dubbed over. As they were children, instead of offering his guest a drink it was a desert with choccy topping. Nothing to do with the financial services of the advert.