Delia Blumenthal at Waitrose

I admit to being a little bemused by the current Waitrose advertising campaign which brings together Heston Blumenthal and Delia Smith. It's exotic snail porridge for breakfast, followed by boiled egg and soldiers. The big question for me is exactly why these two giants of the culinary world have been thrown together and what they have to do with John Lewis' flagship food store. Maybe all will be revealed in due course.