4 Wheel Drive/SUVs: Freelander td4 air con problem, freelander td4, ford pickup

Question
I noticed a pool of water under my landrover,i checked it and it was clear so was not coolant, i then noticed a pipe at the back of the engine bay dripping water and that all the pipes of the air con system were freezing cold and all dripping with condensation too. This would not normally bother me if i had been using the air con but i havnt actually used it for 2 months. I have just turned the air con on to see if it is working ok and appears to be working fine.Any ideas why there is suddenly lots of condensation dripping when the air con is not even turned on? Ever heard of anything like this before? Many thanks

Answer
I have seen something like this, but it was on a ford pickup, and the guy was running the defrost and it was on cold and it was doing the same thing, it ended up being that the a/c system was plugged in that case , really cant tell what is going on with yours without hands on . Thanks ADAM