At LHR's 2nd biggest carrier, g/staff were not allowed to open the door from the outside on a live arrival, and also were not allowed to even bang on the door to indicate the jet bridge was on and it was safe to open. Lost count of how many times I and my colleauges had to stop the jetty to shout at the crew to close the door so we could put the bridge on.
Apparently came about as a result of g/staff at an outstation banging on the door, and crew not disarming the door before opening it, so the banging was stopped as it "distracted the crew"
Now they have Airbusses rather than Boeings, it would actually be safer to open from the outside as the mechanism "should" disarm the slide, which it won't if opened from the inside !!.
