Maybe I am a little harsh - but just lately it seems to be happening a bit too often. For a 200' cloud base with forecast improvement in the weather- it seems a bit much? Believe me - if we see no improvement forecast we will be carrying the 45 mins extra ! I think the main gripe is not being able to see why LVPs have been enforced and why this hasn't fed its way back up the line to become a slot delay at point of departure rather than an unexpected airbourne delay at LHR. I think I will have to revise my way of thinking - a bit like treating PROB 30 SN as PROB 99 !
411 A - I think that FRA and AMS have their own little foibles too - ie. last minute changes of runway and (sometimes) poor appreciation of aircraft energy management - they are just luckier with their enhanced capacity.
Still damn fine controllers at LHR ! (and Swanick etc)