On today's show, Jamil and John take a break from their normal problem solving, instead turning their attention to one particular style: Porter. Joining them is famed author and historian Martyn Cornell, who has written extensively on the subject of beer, and he is well equipped to guide Jamil and John through the complicated history of the working man's beer. It's a fascinating conversation - there's even a great factoid about IPA in there for you non-Porter people.  Learn more about your ad choices. Visit megaphone.fm/adchoices