I saw Paula Deen doing an episode on English Pub Food after she and Michael took a trip to London.
She made a fabulous looking shepherd's pie with the mashed potatoes on the bottom, topped with a layer of leftover roast beef and gravy, peas and carrots, and then a layer of bisquit batter over the top. She used baking mix, and made the batter about the thickness of pancake batter, then poured melted butter over the top. I can't remember all the details, but it looked scrumptious.
I looked for the episode, but it's not listed.
PS...I did a search, and here's the recipe:
http://www.foodnetwork.com/food/cda/recipe_print/0,1946,FOOD_9936_33268_PRINT-RECIPE-FULL-PAGE,00.html