No interactions present.
Lithobius forficatus is a BIG species. 'Tiny' sounds more like Lithobius microps, a very common species in gardens etc.
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
Would tend to agree with Steve - shape, last two pairs of legs, size but obviously cannot be certain
Lat/Lng: 51.5, -3.0
OS grid ref: ST3288