Originally Posted by
KARFA
She was correct. It is by invitation only at T3 and your cabin crew should have given you one. The invitation references the airline and it is the airline who pays.
At T5 there is only one airline really which is BA (apart from a few IB flights). Not too hard to work out who is paying for the passenger there.
Never knew the airline had to pay for FT access. Interesting. Thanks! ^