Hi Kazza, madly enough, I was thinking of this exact recipe only today!
But, by my recollection, it was Rick Stein (of fish fame!) who cooked this dish.
I cannot find any reference to it on the BBC Food website.
Saturday Kitchen uses excerpts from older cookery shows like those from Gary Rhodes, Delia Smith and Rick Stein. It seems there are copyright issuses regarding the recipes from those excerpts. So the website doesn't print the recipes. Which is a shame.
Another reference on the web says you can get the recipe from one of Rick Steins cookbooks...So a trip to Waterstiones may be in order. Good Luck!