I got a ticket for myself and my brother for St. David's Hall in Cardiff, but the pre-sale didn't become live until somewhere between 10:15-10:30am, I tried loads of times, I found that Hamburg was live, then I went round the various sites trying to figure out what I was doing wrong. Then went back to the Cardiff gig and it was OK. I did notice that for some seats you could book only 1 and others 2 max. Either way got tickets, and St. David's Hall is probably my favourite UK concert venue, great view of the stage from every seat I've had, and the Acoustics are great, even beats Birmingham Symphony Hall IMHO.