Big Brother

Went out to stretch my legs at lunchtime, and spotted this beast hovering over the wind turbine near the business park. I assume it's a drone.

At first thought that maybe 'they' (whoever they might be) were inspecting the turbine blades, but perhaps not - it proceeded to hover over several business units before disappearing round some buildings. The red lights turned green occasionally, maybe indicating when it was filming. Possibly it pictured me taking a photo of it...