I'm a male "In charge" but for another UK airline (charter with a big grin!).
I have no illusions about the chain of command - nor does any other "In charge" that I have met: Commander, F/O, then us. I only mention this because I have a suspicion that this problem is one that is specific to a particular large British airline, rather than a widespread one amongst the industry. At least that's my perception.
That said, I do have a concern about the volume, and quality, of communications thru a locked flight deck door: I'm not suggesting that we don't lock the door, but I believe that more concentration by the legislative authorities needs to be applied to the communications issues that arise as a result.