Geograph - photograph every grid square

The wedge of dark grey material furthest away is what appears to have moved. It is being recovered by two or three machines. Soil stabilisation works have been in progress at least since a landslip in mid-February 2014, that also closed the railway for a few days. Some local people have questioned the wisdom of cutting down all the trees because their roots must bind the soil. However as long as they are not dead they will regrow and the roots will maintain that function.
The material that moved has come from the top of the slope, close to the contractor's compound and perhaps assumed to be stable. It was rumoured that the tunnel lining had cracked. The incident was reported: Link Today, 1 February 2015, a yellow helicopter circled the site a couple of times.