Originally Posted by
onobond
Yes they are, but exit train, one stair up and return to other side of next train. Voilą, soon enough at UK border and out
Which allows another part of the cunning plan to be enacted - make sure the F ticket is on a flight operated by an A380, and pop into Starbucks in T5C to collect your £15 of goodies on the way back to the train ...
Voilą indeed.