Originally Posted by MikeNL
well.... im non reving all flights going west from yyt are cancelled due to the snow and tomorrow is booked but i can go through lhr to get to where i want to go final destination is ywg.
so i dont plant on leaving the terminal...
just dont have time to get a passport now
From what's been mentioned, in this situation you will not be allowed to travel overseas without a passport or other documentation permitting international travel. In the absence of such passport/documentation -- even if you don't have to clear immigration/customs at LHR (which you don't have to for transits) -- you won't be permitted to board the flights you wish because:
1) the airline will not allow you to check-in/board; and
2) the UK will hold the airline accountable for failing to supply APIS-type information from a passport or other documentation serving a similar purpose.
No passport, no go.