I had to go to the tip today as it was sunny I took some more pics of the site of Chevening Halt
Standing on top of where the bridge would have been. The cutting to Dunton Green would be in the foreground you can just about see the course where the infill has slumped. The high tree in the background is the start of the trackbed.
The other side looking west, the west end of the platform is under the south bound carriageway of the A21 Sevenoaks bypass which would have had to have been a bridge over the railway.
The much maligned M25 does not really encroach too much on the trackbed just parts of the clockwise hard shoulder, a lot of it runs beside the line. Junction 5 is 100 or so yards north of the railway. The only part that goes over the trackbed is the section that filled in the Coombe Bank cutting.
Not a good picture a snap shot taken from the dash cam of Coombe Bank Drive, the road was flat here and went over the railway, the cutting has been filled in and the M25 on the top of it, the road has been built up to cross the M25 overbridge.