On leaf littler, attached to leaf. Another one 'glided' over wet leaf.
No interactions present.
This looks to be the wrong shape for Philoscia which has a definite 'step' between the pereon and pleon. The epimera of Philoscia do not have teeth on their lateral border (photo 2).
Lastly, Philoscia does not glide - it runs 'full belt'.
So, I'm not sure what you have here!
Lat/Lng: 53.7552, -0.3634
OS grid ref: TA080300
On leaf litter in garden