Where abouts are you in the UK?
There's snow centres at hemel
MK, Braehead and Castleford
All these are indoor snow slopes, around 150m+ in length, Hemel is the most recently opened and debatedly has the best snow conditions, they have park nights on Thursday, Friday and Saturday called Park&Ride, costing around £30+
MK has small park features e.g boxes and rollers on the slope all over the summer, with one hour costing £16, and the price going down per hour, the more hours you stay, their park nights varies along with their features, but all information is on their website.
I've never been to Chill Factore but hear good things about it.
Hope this helps