yes......we have a set of them about 8 miles from where I live Dan...........our site is called HMS Inskip
They are monitoring areals for the Ministry of Defence and are the aerials that pick up every radio, TV and mobile phone communication anywhere in the world...they are our eyes and ears in our continuing fight against terrorism.
I was once given a guided tour around Inskip as a friend of mine was one of the staff at the station and it was fascinating.......they are , for want of a better word......a modern day GCHQ........and there are a number of stations around the country all linked and patched in to each other, monitoring certain areas of the world.
hope this helps.
neil.