Originally Posted by
obra
There's also a Yotel in T4 (Groundside) which rents 'cabins' by the hour. It's cute and reasonably comfy. With a six-hour overnight connection, you can actually get a couple hours of a nap and won't have to shell out for a whole night's hotel or leave the terminal.
Since no OneWorld flights are in/out of T4, I wonder how convenient the Yotel or Hilton offerings really are. I'm not aware of any trains from T5 to T4 --- are there frequent buses late at night/early in the morning? Re T3 - T4, I wonder what time the Heathrow Express shuttles from T123 to T4 stop, or whether this also requires a bus (or expensive taxi) after midnight?