Since Thomas Heatherwick's Olympic cauldron raised its flaming spindles to the sky on 27 July, sales of songs used in Danny Boyle's opening ceremony have shot up by 185%. This compilation, made available immediately after the event, rocketed to No 1 in the iTunes chart in four countries. It features some of the key moments in the soundtrack – Jerusalem, Tubular Bells, Dizzee Rascal's Bonkers – but not much, understandably, from the whistlestop tour of British music midway through (no Stones, no Jam). Instead, on disc two, we get a long and slightly featureless mix by musical directors Underworld. If you want to relive the high points, stick to disc one.