Not too far away, the former goods yard area at Betchworth station has been completely cleared of mature vegetation, including trees, and was full of engineering vehicles this morning when I caught a train (see my hurriedly-taken photo). Further along towards Dorking there is new line-side fencing being erected - is the Betchworth site for this work? Seems a lot of work to open the site just for this. I know there have been RRVs getting on and off the railway at Brockham recently (they've been left at the side of the A25 there!), so Betchworth station seems too remote to be useful here.
Also, I wonder why this fencing
needs replacing, as it's buried under thick brambles all the way and is at
extremely low risk of breaching by trespassers! There must be many sites where this work is much more necessary (far higher risk of trespass, etc).