The big LL fog day, came into work for the afternoon duty to find we were just about the only airfield open in the South East, aircraft parked everywhere, including nose in to the tower behind stand 9, fairly surreal to see the B757 sat in turning circle with steps and vehicles driving out to change crews.
Can't be the big LL fog day I remember, that was in 70s with Sabena, Lufy, Lingus, Iberia everywhere all day, I think they even abandoned stand numbers with nose in & out everywhere....