Well, done a bit of digging around the net and found
this, a report about the planned windfarms in the Wash and their effect on the ASACS radars at Trimingham and Staxton Wold done in 2007. Seems the Radar Type 101 doesn't like wind farms (which means the Type 102 wouldn't either if what I've told about the system is true, Note in the report that BAe declined to offer a solution to the problem). TPS-77 seems to have already had a trial against wind farms and seems to have done OK.