(info taken from tropical islands website)
Tropical Islands has good access for wheelchair users. There are wide passageways and toilets and changing rooms are accessible. Many parts of the Hall can be reached via ramps or lifts. Even the Rainforest is accessible for wheelchair users: paths are paved and there is a maximum incline of 6%. If you have any difficulty, our staff will be happy to help. Wheelchairs are available for hire at the Information Desk inside the Dome, close to the entrance.