Hopefully you can make out they eye good enough. I didn''t get a chance to measure it, but it was fairly small. I'd guess at around 4mm.

Hi Tom,

Thanks for the extra image. To me that's clear enough ;o) If at all interested, you may compare here.

I'm having a bit of déjà vu here, so please refer to the comments with image 371410 for arguments & disclaimer on the ID.

Cheers! Arp

P.S. The 4mm would indeed have been in the range that would have allowed for Trichoniscus and/or Cordioniscus to be candidates, but the eye rules those out. At 4mm this is either a male or a younger female, my money is on the the former. Full grown females reach up to 6-7mm which also makes them separable from the species mentioned (at 3-5mm max)