wiedehopf: According to these jepp plates i found EGPH only has up to Cat II with a minimum RVR of 300m.
As you can see below it dropped below even that for a time, so no one could land.
Not sure which plates you are looking at but they don’t tell the full story quite...There is at least one operator I know of, whose short haul aircraft frequently go in and out of Edinburgh, who has approval and appropriate “plates” (not jepp) for CAT3b Ops on 06/24, Nil DH, standard 75 m RVR TDZ/midpoint minima...