Originally Posted by ARR72

I’m sorry, off topic, I wasn’t aware of this perk. I’ll do some googling in a minute, but if you don’t mind me asking, how does this work? I also have a trip next month, with prepaid Heathrow Express tickets (3 pax). Thanks

Edit: just found the info on the Star Alliance page. It’s not specific but what I gather from other discussion elsewhere is that it is only valid for the cardholder/no guests. Limits my use. In either case, good to know.