For the twenty-first (and counting!) time, its Kellogs Bran Flakes. When you want to ask again, and the Site advises you that your Question may have been answered before, and shows you the twenty-one times it has been posted, and then asks you if you still want to ask your Question, the answer you are looking for is NO.
Trouble is, it only searches the titles. So if the title had the word "tasty" in it, then it would probably come up with a relevant previous Q&A. But something nondescipt like "t.v. advert" will bring up loads of irrelevant queries. Anyway, it's Kellogg's Bran Flakes.
No, not Fruit 'n' Fibre. That particular product had a jingle that went "Apples, hazlenut, sultanas / Raisins, coconut, bananas" or something along those lines.
Apologies Chewitt! As you may have realised from the (unfair) stream of vitriol that has poured down on you, this question has been asked loads of times, to the point where the regulars on the site feel it is being done to wind them up (and as you can see, it's working!) It's a shame that as a new user, you walked into an existing throny issue, I hope it doesn't put you off posting in the future.