No interactions present.
Chris is correct about the colour and smoothness. Also the shape of the telson is diagnostic - it is an elongated triangle in Oniscus. It is a much shorter 'equilateral' triangle in P.scaber.
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: 52.965, -1.146
OS grid ref: SK574411