There seemed to be a lot of these on the trees after dark.
No interactions present.
I assume it is not possible to get to species level from these pictures.
The striae on the body are out of focus and there isn't a clear shot of the telson. It 'might be' T.niger but it could be another species.
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
this one was not retained so will have to remain unidentified.
Lat/Lng: 51.254588, -0.315486
OS grid ref: TQ176519