HEATHROW DIRECTOR
I've seen very close to it
Were you on duty on 8/12/91? We held for two and a half hours at BNN (JFK-LHR). RVR went below limits at 600ft but saw the runway OK at DH (still had EGCC plus others as diversion). Wx was only above our limits for about 20 minutes for the entire day.
Airclues