Fixed wireless broadband and wind turbines, good or bad?
While from a distance wind turbines can look tall and thin, the pedestal is pretty wide to support the weight, and additionally the blades can create periodic drops in signal level and variable amounts of reflection. Ofcom in 2008 looked more closely into this, and for a single turbine concluded that if the turbine is in the signal path, a 2dB drop in signal level is likely.
This means that if the wireless service in Northlew is a single transmitter with individual antenna at each property, picking a reasonable location should avoid any problems. If subsequent wind turbines are added to create a wind farm, then things become more complex, and the Ofcom testing suggests that farms can create fairly large periodic drops in signal level.