A couple of hours before we meet Noah Kahan in a vacant suite of his fancy West End hotel, he posts a video of a new song, called Porchlight. Nothing unusual in that, you might think. But the video features the 29-year-old Vermonter singing from the lavatory of his hotel bathroom ; with a hashtag reading "explosive diarrhoea". So it's with a little trepidation that we greet him a couple of hours later. Is there a safe exit route if he's caught short? Should we ensure a plentiful supply of