Smooth brownish grey. Dark markings.
About 28cm - presumably a juvenile.
No interactions present.
At 28cm it's nearly mature. I would think born the year before last. They are about 10cm when they are born.
Lat/Lng: 51.2253812, 1.1960367
OS grid ref: TR232522
Village with mixed housing, open grassed areas and small woodland about 200m away.