The aforesaid AC/DC album turned in an excellent second week sale of 270,923 but despite its efforts and the plethora of high debuts sales last week actually retreated by 1.7% compared to the previous week.

There's worse: At 6.96m, sales were down a massive 24.76% on the same week in 2007.

And let's not forget that 2007 was itself a disaster, with album sales in the year of 501m. It was the seventh straight year in which sales slipped, and ...