My annual pass has always been done through Tesco. The current price for the Merlin pass is £31.50 in vouchers. I can't really see the value of a one park pass. I was in London last weekend, and we went to Thorpe on Sunday and Monday plus we popped onto the Eye on Sunday night. Wehn I was down in May, we nipped over to Legoland and Chessington, as well as Thorpe. At Christmas, we are more than likely to check out Madam Tussauds. That is in addition to half a dozen visits to Alton Towers.So, whilst the Alton Towers pass may be a decent deal - London is a long way from Alton, the Thorpe and Chessington passes would not appeal to me at all.