Thanks to Colin B for writing in. Colin says:
Here is the view looking west from the top of Parwich Hill, where the mobile reception is splendid.
I have marked the location of the phone mast. So whenever you need to make a call, just run up the hill.
If you cannot be bothered to do that, I suspect that the call wasnt all that important anyway.
PARWICH.ORG 
Wow! In all my time looking out across this panorama I never noticed the aerial. I do think however they should paint it green – it looks like a great big white arrow to my mind……..