Barbel:
I have found the CAA and MOD both very professional, impartial and fully up to speed on all defence and civil radar and ATC issues
In that case you must be living somewhere other than the UK. MOD has a sorry history of making up policy on the hoof, changing policy every time there's a personnel change, putting personnel that know nothing about the issues into post without giving them training or proper handover, and issuing objections with no foundation that are then withdrawn after multiple attempts to get any response whatsoever. Meanwhile the people that really know about the effect of wind turbines on radar - MOD's own controllers - are probably the most experienced and capable in the world at dealing safely and successfully with clutter from any and all sources, and the Watchman routinely sees lots of clutter and always did, long before wind turbines came along.
MOD's real problem is that very soon they will have to decide whether to embrace plot-extracted radar. This will give them a much cleaner picture, but almost certainly at the expense of not seeing some things that they want to see, and currently do see.
My prediction is that they will install plot-extracted radars, but will then spend squillions trying to make those radars behave more like the analogue radars they replaced.
NS