Arrived bright and (too) early at Heathrow for my flight out to the States. United seem to have seriously overbooked their flights, everyone arriving was given a slip of paper offering $800 of flight vouchers if they went on a later flight. Unfortunately I was on the last flight into Portland that would get me into the conference in good time, so decided not to take them up on it unless they started offering actual money. In the end they didn't.
The queue on the right is for economy passengers. The lack of queue on the left is business and first class.