OK, OK..... Before anyone leaps..... I'm old, past it and don't understand current ops.. Just to say the delays you mention were happening 10 years ago when there was NO delay at Heathrow. I was sitting around doing nothing one morning when a BA flight from Frankfurt said he was surprised at getting a straight in because he'd waited 45 minutes on the ground due to "delays into Heathrow". It's often the case that en route delays are blamed on the destination..... just like pilots telling pax that the delay is due to ATC!!!