But that was the same in the 90s.Personally I think the cost is a lot to do with it
a day out at towers is easily £100 plus for a family of four let along six like my family. I can pay for a whole years national trust membership for that
I only went to Alton Towers once as a child/teenager as it was expensive, but we did make a few trips to Drayton Manor. But we had National Trust membership for years!