So the pigeons and doves are still there! They surprised me during a visit to the site in 2014.
The clean up of many engine house and mining areas within the county is to be welcomed, although the purists may ague that this is akin to "sanitizing" sites. Certainly the Cornish gorse is something to be reckoned with, and its removal is to be welcomed. My last brush with this stuff was while trying to gain access to the Wheal Liberty viaduct on the long disused Perranporth branch line; it defeated my attempts and I came ways with sore legs.
As an aside, the convenient little parking places which have been made to many interesting mining locations are often surrounded with this invasive, but colourful plant, and thus screening one's vehicle from prying eyes. But, at the same time this gives the local mafia an ideal cover for a quick smash and grab and the broken glass at the parking spot for Killifreth was enough to persuade me to abandon my short stroll to revisit the site after many years.
'Photographers deal in things which are continually vanishing and when they have vanished there is no contrivance on earth which can make them come back again' [Henri Cartier Bresson][i]