We just got back from our day at Alton Towers (tickets won on mumsnet). We all had a great day out. The boys can't wait to go again when they are "taller and braver"!
Tips for anyone going:
Do arrive early if you can - park opens at 9.30, most rides at 10.
Do study the map carefully in advance (you can view it online), and plan your day. I'd forgotten how huge it was, and we ended up doing a lot more walking than necessary! But be warned some rides don't start til 11 am. (Today this included the Corkscrew, the Flume, and the Canyon Rapids).
To avoid the crowds as we did, go on a day when the forecast is poor ... but it actually stays fine all day.
Thank you again mumsnet.