Most adults have, at one stage or another, suffered from a broken heart. A thoroughly miserable life experience, the majority of us deal with it by ingesting copious amounts of chocolate, moping around the place feeling sorry for ourselves and – if you’re The Thin Air, at least – drinking ourselves into pointless oblivion in pubs. Dan Snaith clearly does things a bit differently, channelling what has been – if the lyrics are anything to go by – a period of considerable emotional turmoil into the ten songs that make up his fourth LP under the Caribou moniker (after two…