Kerridge shaft

This shaft, with the trees growing out of the top, is a bit of a mystery. It is clearly a coal shaft but I cannot find any information about when it was worked or by whom. I suspect that this is a ventilation shaft rather than one from which coal was drawn and it may have been connected to a shaft which stood against the left hedge in the distant field (centre left). It does not show on any of the maps from the 19th century and it is probably related to 18th century workings in this part of Bollington