You could try, I just read the ICO site to determine whether you'd be successful, and I couldn't say. The data could be classed as being used for crime prevention purposes, and additionally for research and statistical (optimal mast locations), and both of those classes of data are exempt from subject access requests, so they could legitimately answer that they hold no data that they are required to reveal.
I'm not sure I've heard of anyone doing a subject access request against a telco for all mast data relating to them... so I'd be very interested to see what you could possibly get back from it.
You could try, I just read the ICO site to determine whether you'd be successful, and I couldn't say. The data could be classed as being used for crime prevention purposes, and additionally for research and statistical (optimal mast locations), and both of those classes of data are exempt from subject access requests, so they could legitimately answer that they hold no data that they are required to reveal.
I'm not sure I've heard of anyone doing a subject access request against a telco for all mast data relating to them... so I'd be very interested to see what you could possibly get back from it.