Originally Posted by
muscat
The previous Police and Crime Commissioner for Hampshire had a sick note saying thst he could only travel in First Class on the train because of his bad back. This meant he claimed in excess of £100 on every trip to London, compared to the standard fare at about a quarter of the cost.
But that would be between the gentleman concerned and his employer based on necessary business travel and applicable terms of his employment contract. The OP is referring to discretional leisure travel and expecting accommodation at the carrier's expense. I see no reason for this.
Perhaps the OP's medical insurance is a more appropriate place to ask for financial support if normal travel conditions are not medically acceptable, but I think we all know what they would say.