The Fiskerton nodding donkey

Or should I say one of them as there are two of these beasts situated on the old airfield !
Must be extracting a fair quantity of oil as the tanker is there every three to four days emptying the silos that collect the liquid gold from the pumps themselves ??
Anyhow the reason for this blip ????? I'd been meaning to get a shot of these during the summer this year but never got round to it, but as I drove past this morning it struck me as odd to see it working so late in the year, it's normally off and resting when the cold weather is here, especially when it's icy !!!