The one thing that civil servants hate is when they start getting asked awkward questions from those above. I contracted to a government department for a time and you should have seen all these guys cover their ar*es when tough questions were asked. More so for PM's question time. Their greatest fear was getting booted out and losing their pension. Try your local mp and get him/her to ask questions in the house. Also I vaguely recollect there being some supposedly "aviation friendly" mp's around. A quick trawl should identify who they are and send them a note.