Maybe try smaller unit. . Cranfield, Cambrige etc. . . i have previously had no joy with Stanstead, Heathrow, Stanstead etc but who knows you could be luckier than I am.
Managed to speak to someone who was very helpful, (3rd time lucky) at Luton (managed to get through to the tower) and am waiting for an approval from them(theyaskedme to put in my request in writing- well email).
If all else fails, keep trying until they give in
, or in your case, switch on the charm
