Shallow the path, the speed decays even more quickly, increase rate of descent and you end up in Hatton Cross.
Knackered Nigel, I think you have got it totally wrong. Personally having flown into LHR for 35 years, the last 6 on the B777, I feel if they had thrown the glidepath away and held onto the speed there is now way they would have got any where near Hatton Cross. They would have had the speed, all be it with a high rate of descent, to complete the flare but would it have been on a level surface? Most certainly not!