Life in the slow lane. TT196

Found underneath some leaf litter while tidying the garden was this tiny stripy black object, smaller than a Woodlouse and much smaller than the Ash key which I've included for scale purposes. In trying to pick it up to identify it, it rolled into a ball about the size of a small pea. Turns out it is a Pill Millipede or Glomeris Marinata if you prefer.