In reply to yikes:
>
> Does anyone have any experience of the other ones?
The Leeds (Castleford) ice wall is very good, but expensive; and you have to take a qualifying session to prove you're fit to belay.
I managed to get some time on there buckshee last year, still not sure if it's worth paying for. (I worked out that if I get 4 in my car, it's cheaper to drive up to the Ice Factor for the day than go 12 miles down the road to Castleford!)