Chap up the road from me had a medium sized one installed about 4 years back. I approached the company who installed it with a view to having the same. Plans were quite advanced, agreements drawn up etc, when the company backed out. Apparently Culdrose (in whose MATZ our properties both lie) were intending to object to all turbines above a certain size in the area, on the radar interference grounds already referred to, so my plan for a nice little £5k pa addition to my pension came to nought. When we enquired about how my neighbour's one got through, Culdrose had apparently objected too late, and weren't going to get caught on the hop again.
Funny thing is there is a much bigger wind farm with half a dozen large turbines just a few miles South of Culdrose - that seems to got through ok without interfering with the radar, but what do I know? Mrs TTN was pleased, though, she never really wanted it anyway.