Hi, i havent used it myself, but someone told me to get our suitcases, carry on past that money exchange stall, get passed the guards and as soon as you get outside its either on your left hand side, or it maybe your right, but i am definetly sure it is outside.

Hope this helps

It's outside and about 20 yards to the right in a little glass kiosk - possibly with a guard sat there.

Spot on. If you're using the transfer bus, get your stuff on first and then walk back over (you won't be going anywhere fast).

It's on the other side of the grotty airport cafe next to where the buses sit.