Having somehow managed to avoid this for many years, and now having a trip to LHR coming up in a few days I've signed up.
A question on getting worldpoints for the Heathrow Express online - how does one do that? Going to a booking I got all the way through to the screen to enter card details without having the chance to enter my worldpoints number, is it post payment (a little unusual) or do I have to log into my account?