So the justification for the release of this compilation album of ‘mash-ups’ (you know, when you – yawn – stick the vocal from one track over the instrumental of another) a good half a decade after the novelty has worn off runs thus: ‘Hey, it took us ages to get clearance for them all, OK?’ A valid excuse, maybe, but the simple truth is that no-one, no-one cares any more. At all. Ask yourself this: if you’d been around in 1972 and someone had promised to hand-stitch you a pair of bell-bottoms, then delivered them in 1977, how would you react?