Okay...you want to bring out the "anorak" in me:
15/1/97: AI (2 x 747), KQ (A310), PK (747), VS (747), KU (747), LO (737), AY (DC9), PS (737), CP (DC10), RG (MD11), MS (A300), CO (DC10), AH (737), UA (767) and RO (737) diverted in addition to the BA planes.
26/11/93: NW (DC10 & 747), KU 747, VS (2 x 747), MH (747), EK (A310), TK (A310) and AZ (2 x DC9) all accompanied the BA planes.
25/2/92 SV (747), UA (3 x 747 & 1 x 727), QF (747), AA (747sp), TW (747), RH (767), BW (L1011), AC (747), VS (747), MH (747), NW (747) and CX (747) all visited as well
13/12/91: LH (737), HV (737), KL (737), TP (737) and CY (A310) as well.
All foggy days/evenings at LHR/LGW. Fortunately for all, I don't have a list of countrywide diversions from LHR/LGW to hand
Or put more succinctly:
Fog = hold = low fuel = divert!
Besides, we know that BA are loathe to handle diverted aircraft here, even for the "splash and dash" scenarios.
Ringwayman