For some reason the Edit function won't take the rest of my post...
However, the biggest risk is that if our company call us and want us to get off.(As does happen occassionally). Our checked in bag must also come off. That's going to cause at least a 30 min delay. Some how I can't see the airline and other passengers being happy with that.
What causes the delays at Heathrow is people not reading the signs and getting themselves prepared. ie over coats and jackets off, things out of pockets and the like. What would also help is longer "roller runs" so you can get your bag onto it while stripping off and dragging the laptop out.
I bet the queues would run a lot faster.
Oh, and employ more people.