HS2 tunnel spoil to fill in a Cambridgeshire open-pit mine

A former brickworks and cement open-pit mine just outside Cambridge is to be filled in with spoil from HS2 tunnels at Old Oak Common. The spoil is being created by the building site at Old Oak Common for the new hub station there, and the tunnels under the area, including the huge crossover cavern being built just to the west of the new station.
Mega-tons of spoil need to be disposed of somewhere, and while Crossrail was able to send its spoil to help create a wildlife reserve in Essex, HS2&rsqu