This post tells you how to get from the main departure level 2 in T5B to either the main building T5A, or to T5C.
This is slightly more complicated than the other terminals, mainly because the lift you need for this is NOT the one used for the transits. The transit lift brings you by gate B35 by Harrods. The lift you need for this procedure is by Boots, gate B36. The photo below shows the correct lift you need for this, with the blue Boots store on the right:
Now there is one slight quirk to be aware of. The passageway is labelled in the lift as -4 (and staff only), but in 2 of the 3 lifts if you press it, -4 lights up briefly, then switches to -2. Don't be fazed by this, just go down to -2. As you leave at -2 you see this sign:
pointing to this staircase:
This short staircase brings you down to -4 and the same passage area shown in the post above. The signs are very clear, left for the main building T5A, right for T5C.
Arriving at T5A
If you are going back to T5A, you are walking against the direction of the 4 moving walkways, until you come to the end of the passageway and this sign that brings you to the same lift used to get to transits. There may be a bit of a wait for a lift, since it may well be detained dealing with a lot of transit passengers on the downwards section.
