Glasgowgirl,
I have visited newcastle ATC and got a visit to Prestwick lined up. The Prestwick one was done through the lovely HR guys. Just phoned them up and asked if they knew who I could contact to arrange a visit.
I have to say that the Prestwick people couldnt have been more helpfull and accomodating to get a date for me to visit
Is there a nasty ATC about?!! because I have yet to meet one.....lol!
The newcastle tower one again was just done by ringing them up and they were only too glad to help.