If travelling as part of a group then it is possible but will cost £30.
If the ticket hasn't been bought under a group scheme then I don't think it is possible. Call them - 0844 493 0 787
Good luck. I don't think this is possible.
Just spoken to a friend who works for BA - if payment hasn't been made then its possible but you need to be quick. If payment has been made he says you have no/little chance. Sorry.
Also - seats often dont go to waste, airlines will try to overbook a flight by a certain % on the basis that people dont turn up![]()
James