Well I finally managed along to the John Paul Gaultier exhibition at the Barbican.
I was pleasantly surprised at how big it was and quite how much stuff there was – I have Barbican membership so I may well go back for a second look round.
There is a free app to accompany the exhibition which I would recommend downloading. There is free wifi in the Barbican but it is slow-slow-slow so it might be worth doing before you leave home.