Last year, I flew NZ 2 from LAX to LHR twice, once right before the Olympics and once in early December before the Christmas on-rush. The first trip, it took about an hour to clear immigration because of the queues; the second trip, under three minutes. In addition, it seems that the online complaints in regards to Heathrow immigration queue times all date from last year.
As I will be traveling to Heathrow again several times this year, I was wondering if anyone knew if immigration times have stabilized to a semi-predictable length since the Olympics?
I'd be particularly interested in information on Terminal 1, but any information at all would be helpful.