The tickets for Leeds Castle in Kent allow you entry for a whole year, not just the day. OK, so it's not exactly a discount, but for 12 month's admission, it's an absolute steal!

Kelloggs has a promotion on many of its cereal packets at the moment offering a free ticket to zoos and aquariums (aquaria?) when accompanied by a full paying adult. Worth noting too that not all zoos and aquariums are signed up for the offer, but there's a pretty good selction, with around 40 or...