UK Border, Flight Connections Centre (FCC), and Domestic Arrivals Area in T5A
The UK Border for arriving passengers and the main FCC for connecting passengers are next to each other in the northern part of T5A. The below diagram shows the layout of the UK Border and FCC, and this should hopefully help you navigate your way through wherever you are heading. Although it may appear complicated on first glance, the simple version is if you leaving the airport go to the UK border, and if connecting onwards go to Flight Connections - with the channel for UK/DUB flight on the left and channel for all other T5 flights on the right.
The posts below go in to detail on the different types of connections or arrivals you may do at T5, and all the different possible routes you can take.
Please find a link
to this diagram in PNG form here, and a link
to this diagram in PDF form here.
T5B->T5B, T5C->T5C, and T5B/C->T2/3/4 Connections
There are two smaller flight connection centres in T5, one each in T5B and T5C. If you arrive at T5B or C and your onward connection is from T5B or C you can use these smaller connections centres in each of the satellite buildings and avoid having to go to T5A.
The airside connection buses from T5 and all other terminals drives past T5B where there is an ‘on request’ pick up point. This means if you arrive at T5B and your onward connection is for another terminal you can use the airside connecting bus service directly from T5B rather than going to T5A to catch it. If you arrive in T5C you can walk to T5B or take the transit train for one stop before getting off and going up to this airside bus pick up point.
More details on these T5B->T5B, T5C->T5C, and T5B/C->T2/3/4 connections can be found in the posts below.