Sorry I'm replying to this nineteen years after the question was asked and hope you are still alive and well.
I was part of a team who composed and recorded jingles for BBC's Steve Wright In The Afternoon from late 1989 to the early 2000's. The jingle you're curious about was called An That's Before Me Tea was one I wrote and performed under the character name of Mr Food in 1990. As well as that one there were subsequent jingles broadcast which I did all repeating the same theme till suffering indigestion :) ....The Nosh Rap, Runny Brie, Broccoli, 12 Days Of Christmas (Fried Onion Rings), etc.
All the above can be found on a YouTube channel called NOSH TV which is an archive of TV appearances, interviews and assorted clips of other silliness relating to it. Hope you have fun looking at it.
Different times!
cheers
Dave Sanderson