To give another example of supply and demand I prefer solo cabins on P &O and Cunard but unless I book early they are sold out as they are very popular. I know that if I choose not to book on release or close to I am unlikely to get one. I can moan all I like it’s a commercial decision how many solo cabins they want to offer. I could say I am being discriminated against as very rarely get a late deal. Similarly families requiring spaces for children of a certain age will be unable to book when the quota for a particular age is reached. Is that discrimination? No it’s down to the polices of for the sake of discussion here of Carnival U K . When she was alive and a full time wheel chair user my mother used to like the car parked in particular blue badge holders car park on the Market Square where we lived. If all the spaces were already taken and we couldn’t park was that discrimination ? No. Just others of equal or greater need got there first. I can’t see how you can force the cruise lines to offer an infinite number of cabins just in case someone wants to book. Health and Safety trumps everything and I am sure the other regular posters will know more and can correct me but the various Acts covering disability discrimination do not apply at Sea. There could be a better system such as others have suggested using a waitlist scheme to alert those who need an accessible cabin one has become available.