Where's your favourite pork pie in London?

Armed merceneries storm your modest flatshare, weapons pointed wildly. What could they possibly want? In a low growl, their leader makes their terrifying demand: "Bring me a bloody deliciousy pork pie in the next three hours or we'll eat ALL your Nutella and tell your landlord that you've got an extra person living here. They'll put your rent up by £150 a month FOR SURE."

Question being: where do you go for said meaty snack? Answers in the comments!