Join Date: Jan 2015
Location: Bregenz, Austria
Programs: AA, BAEC, Alaska, Flying Blue, United, IHG, Hilton
Posts: 2,950
The last time I came through LHR, I had a 4-hour transfer T3-T5 and chose to come out landside and use the T5 Arrivals Lounge, so I had unlimited opportunities to wander out.
LHR generally is not a good transit option for a smoker.