Walk into almost any Indian restaurant in Britain and you will see the same pairing on table after table: a curry, paired with a cold bottle of Kingfisher beer. It is one of the most recognisable combinations in British dining, so familiar that most people never stop to ask why it works. At the new Madras Cafe bar on Stockwell Street, now properly stocked and ready for a full evening, it felt like the right moment to explain exactly why curry and Kingfisher go together so wel