Originally Posted by
Howgart
Happens all the time at LHR. In fact, I cannot remember my last flight through there without at least one circle around (I'm in and out of there on average 4 times per month). Whenever flying through Heathrow, I automatically add at least 15-20 minutes to whatever the official stated arrival time is. Usual reason given is flow control/traffic.
Had this year one with OS flying from VIE to LHR without any holding patterns straight in to land. It was the evening flight, so it could be possible, that there were not so much flight traffic at LHR.