A friend mentioned that Vue cinema in York has a good offer on for morning films at weekends where it costs just 95p per child's ticket. This also seems to apply to half term holidays but I can't work out if it is for summer too. There's also an offer where you buy a family ticket and everyone pays child's prices. Anyway, check out the offers on Vue's website.
Meanwhile at Malton Cinema films showing are Shrek Forever, Twilight Saga Eclipse, The A Team, Toy Story 3 and The Reader in the lounge.