Top class tickets going for a song

A friend asked me recently what I considered to be the best value in concerts. Needless to say I avoided the question – thinking immediately of all those good friends I was about to lose – so, ever sensible, I responded with a question of my own.

“How many world-class concerts would you expect to get for a hundred quid?’’

“Two, maybe three,” was her answer.

What I can say for sure is ...