Thirty years ago I got to see The Wall performed by Pink Floyd at Earls Court in London. It was only ever performed twice in the UK - 1980/81 - and I was privileged enough to see it both times. Every concert I've been to since then, I have measured by that standard, and none have ever come close. When I heard Roger Waters was going to perform it again at the O2 Arena, London, I knew (even tho' it wasn't Pink Floyd per se) it was as near as it was ever likely to get, and I was determined to see it. So determined, that on the morning the tickets went on sale, I had 2 landlines and 3 mobiles ringing at the same time to get tickets for Susie and