New albums from Metallica (Hardwired... To Self Destruct) and Bruno Mars (24K Magic) are No.1 on iTunes in 78 countries between them as we go to press... but that dominance won't start to feed through to published official charts - of which there are, in any case, fewer than 30 - until next week.

Meantime, in the first full week since Leonard Cohen's sudden death, his last studio album You Want It Darker makes widespread leaps, the latest Bon ...