Under bark of an old log on the ground surface.
No interactions present.
Nice shot of the basal node! I notice about 6 or 7 coxal pores on each side. Only 3 or 4 in other looky-likey species (which, as you suggest, also have carpophagus fossae).
BMIG website: www.bmig.org.uk (centipedes, millipedes & woodlice)
BMIG Newsletters ~ www.bmig.org.uk/view/resource/bmig-newsletter
BMIG Bulletins ~ www.bmig.org.uk/view/resource/bmig-bulletin
Lat/Lng: 51.31, -0.189
OS grid ref: TQ263583
Banstead Wood is part of the Chipstead Downs SSSI