[janwhin]

Coquet, I was speaking to someone who worked on the opencast for years and he said that they came across old workings towards Woodside, somewhere near the bends on the Woodside/Acklington road.

He also thought there was the remains of an old drift mine at Newton on the Moor, past the Swarland crossroads (with the school) and then off to the right, towards Newton on the Moor village, just into a field. The Explorer map shows a disused pit on the western edge of the village and to the north of Newton Hall.