Interesting that Hammond acknowledged in the Commoms today that LHR is operating at 98% capacity most of the time, any hicough caused aircraft delays airside and pax queing out the doors landside.
AMS, FRA & CDG all have the luxury of a number of runways - allowing csnow clearing to be done continually without fully closing the whole airport.
If the Govt's Scientific Review suggests that increased frequency of snow is to be expected from now on, then it is very hypocritical of the Govt to also block an new runways in the South East.