@Mike-And-Jane0
Thanks. That is exactly what I always thought, but then this thread confused me. The first comment says, "On letting rooms in your home you become a B&B for business rates purposes and should inform the council when opening."
I suddenly thought, oh no, am I actually classified as a B&B?!
My accountant treats my Airbnb income the same as income from any other lodgers. Anyway, I am sure he knows what he is doing as he is very thorough and that's what I pay him for!
Thanks for clarifying though. That puts my mind at ease. While the business rates relief sounds appealing, I would absolutely not want to pay Capital Gains tax on this property, which has already doubled in value since I bought it.