One of the biggies...a good 15cm when extended. The second picture shows the huge pneumostome on the right side of the mantle.
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Is this Arion ater agg., or can Arion ater ater definitely be told from Arion rufus in the field? My old Aidgap guide from 1983 says dissection is necessary, as colour is not reliable.
My Flickr photos...
Cool photo. What lens did you use?
Canon Powershot G9: It takes excellent macro photos, provided the subject is well-lit and not moving (slugs are handy in that way!).
Thankfully, at 6am there was no-one around to see me flat on my belly on the track taking the photo...last time I was prostrated similarly photographing hoverflies, a couple came round the corner and nearly tripped over me. They thought I had had a fit! :)
Lat/Lng: 53.92239259254, -0.84580510854721
OS grid ref: SE758479
Forestry Commission plantation being returned to wooded heathland