Booze might now be banned on public transport, but that doesn't stop us getting trolleyed in the stations. The Betjeman Arms recently opened at St Pancras, bringing a much-needed touch of class to London's catalogue of terminus taprooms. To celebrate, we decided to go on a campaign for rail ale. Despite objections from our livers and serious renal remonstrance, we spent last Saturday working our way though a laevorotatory pub crawl of the major......