Pop review<par break>Wembley Arena, London The spoof metal band's air of out-of-their-time befuddlement is still marvellously, preposterously intact, says Ian Gittins
Henry Barnes: Guardian.co.uk/music's resident expert combs this week's new releases field with his musicological metal detector and separates the gold coins from the rusty nails
Hammersmith Apollo, London: Even with something as visceral and immediate as thrash metal, it takes time to get this good, and Slayer were nothing short of superb