I'm flying out from Heathrow T5 (!) on Saturday and want to take my bike. From what I've read on their website, it seems that BA will take it for free as long as it's properly bagged up and under 23 kg. There doesn't seem to be anything about pre-booking it. Is this right? I'm just used to getting fleeced, or sorry, dealing with, EasyJet when I've taken my bike abroad before.