Staines Road, Chertsey, Chertsey, Surrey
Massive park which is open mid-Mar until early Nov - times vary so check on the website. As well as white knuckle rides for older children (height restrictions min 1.4m apply on many rides) there are a few gentler activities for yougner children (specifically Neptune's Beach). Buggy hire and all the usual facilities you'd expect from a big attraction.
We strongly recommend you ring Thorpe Park before you set off on your family day out, to make sure they are open and to confirm admission prices. It may also be worth visiting the website for Thorpe Park, www.thorpepark.com, to see if there are any special events on the day for which you may have to book a ticket. Please also be aware that if Thorpe Park hosts birthday parties, this may limit the access in the cafe/restaurant areas.