Many thanks, that's a really comprehensive response. Sounds like a combination of anti-icing, wind and flying into cloud.
We do allow a bit longer for aircraft to slow down when icing conditions are expected but I'd never have expected the variations in speed we saw yesterday.
It's difficult to provide consistent spacing when some aircraft are catching up on final approach and others aren't, we just have to increase the spacing a bit and also expect more go-arounds, a reduced landing rate and increased delays.
Unfortunately, airline (and NATS) management see a drop in the landing rate and think we're taking it easy!
As an aside, the 757's were great yesterday. They took so long to get back to 160kts it negated the low speed inside 4dme
Anyone else who was flying yesterday got anything to add?