Originally Posted by
chongcao
Because you could loose your phone on your way to airport; being stolen on London underground; or simply dropped to Thames river while you are texting; even run out of battery second before you reach the T5 security check. Always better to have a printed back up in case things go wrong.
Well if you take that approach I am afraid you aren't really saving any paper. Bps can be obtained from the SSCi machines or manned check in desks anyway should those misfortunes happen to you.