I am so sorry to go off-thread again and risk the wrath of everyone!!
I have travelled through T5 many times and it is the Dog's B****x.
The first queue I generally find is at WH Smiths in the the Departure Lounge.
As an aside, can anyone tell me why they need to see my boarding card when I am buying a paper and a bottle of water? I understand why that will be necessary for the Duty-Free etc, but in WH Smiths???