The Thomson Celebration is the only Thomson cruise ship which offers access to disabled passengers who use a wheelchair. There are a number of cabins which are accessible, but it is necessary to book these in advance (there is a booking fee). For safety reasons, Thomson is only able to offer cruises to a limited number of wheelchair-users and each of these must have an able-bodied companion accompanying them for the trip. Most of the ship is accessible to disabled passengers, but there are some areas which have limited accessibility. Shore excursions require extra planning.
For more info, see Thomson Celebration Cruise Ship