text: oh great, DG vivid?  wonder what that means.
  
  the shadows cast in aerials show the south mast (not a tower, gitcher terms right) is much higher  and more substantial and almost certainly for UKW propagation as well as additional line-of-sight fixtures seen on the mast.
  
  whether this is also an active element in a MW array is hard to say, as typically favourable UKW propagation (height) does not match the MW/LW ideal ground conditions.
  
  i'd guess, without further evidence, the southernly mast is at best a reflector in a MW array in addition to serving multiple much higher frequencies.
  
  but as usual i am certainly wrong.