There was a rumour floating around the packed Forum last night that David Cameron was in the audience. I did not spot him on my way in, but he did choose The Killers' “All These Things That I've Done” as a desert island disc in 2006 and I imagine that, being a man of firm convictions, Brandon Flowers still floats his prime-ministerial boat. Clean living, passionate, nothing too controversial – just like the PM before he pulled the knife out and started plotting to slash away at the country's finances.