Obstacles up to 300ft a.g.l do not need to be notified and may not be on charts. Some are, some aren't....
One would expect the authority responsible for siting these bits of envirofundamentalist folly would inform the CAA and MoD before sticking up any sounding masts.
The weeny-greenies should turn their attention to bigger projects with more reliable energy sources - such as the Severn tidal barrage.