Approx. 3 inches long and very thin.
No interactions present.
It's quite unusual to see a juvenile without searching in compost heaps etc, but I believe that, although not territorial as such, adults sometimes force the young to disperse - given the date there could still have been a few weeks left until hibernation.
I think this is a young slow worm, they are common throughout England, Wales and Scotland. Slow worms can drop their tail if they need to. They eat mainly slugs and small insects.
Lat/Lng: 51.2, -2.2
OS grid ref: ST8745