Originally Posted by
jc94
I find LHR pretty fast, 20-25 mins from wheels down to standing outside with luggage. At least at T3. That said I have a UK passport but you likely won't be clearing immigration there.
I find LHR to be terrible as at LHR AC uses terminal 2B and it is a pretty long walk and two very long escalators from that satellite terminal to the main terminal. And with some airlines you use a lounge in the main T2 while your flight boards in T2B - I just had this happen with Icelandair which uses the Aer Lingus lounge.