i was listening to jason manford on absolute 80s.
He was talking about emotional support animals and said about aa who had an esa horse in first class on a flight. (had a check and aa allow esa cats, dogs & horses)
on ba help page (they only allow esa dogs):emotional support dogs can only be accepted in the cabin on direct flights to or from the united states of america. If your journey is not to or from the usa, or includes a connection onto a non-usa flight, your emotional support dog will need to travel in the hold.
You need to
contact us at least 14 days before your flight, as we need additional information to ensure your emotional support dog can travel safely in the cabin.
Also, you must contact the uk animal reception centre at least 72 hours prior to the scheduled departure of your flight to the uk to check your dog meets pet travel scheme requirements. They will issue a pre-approval letter for uk entry that must be presented at check-in, along with your approval from us, for you and your dog to be allowed to board your flight to the uk.