Extract from the latest CAP 764 Policy and Guidelines on Wind Turbines
"In addition, the CAA will provide advice and recommendations regarding any extra lighting requirements for aviation obstruction purposes where, owing to the nature or location of the structure, it presents a significant hazard to air navigation. However, in general terms, structures less than 150m high, which are outside the immediate vicinity of an aerodrome, are not routinely lit; unless the “by virtue of its nature or location” argument holds fast. UK AIP ENR 1.1.5.4 refers."
I thought at first that the 150m was a typing error that should have read 150ft but I was wrong.
Beags - the small mast that proceeded the most recent turbine in our patch was 325ft high. They appear to be put at the height at which the hub of the proposed turbine will be at.