From wiki
Manvers Main Colliery was a coal mine, sunk on land belonging to the Earl Manvers and was situated on the northern edge of the township of Wath-upon-Dearne, between that town and Mexborough, in the Dearne Valley South Yorkshire, England. Within the complex was the Regional headquarters and laboratories of British Coal.
Manvers was, in fact, a complex of collieries, the original sinkings being known as "Old Manvers", the later sinkings as "New Manvers", and a coke and by-products plant. The first shaft was sunk in the late 1800s and this was followed by the second shaft, sunk between 1900 and 1901 and later a third shaft was added.