Found this earlier, and thought I'd share.
I've been to Apple Jacks in Warrington quite a few times and its a great day out with the kids with loads to do especially when the weathers nice.
They occasionally run offers, but usually they're quite restrictive with school holidays etc not available. but this offer is available everyday they're open and its £20 off for 4 people.
I've just got mine - I may see you there 
www.atoozeelocal.co.uk/product/family-ticket-to-apple-jacks-adventure-park/