This tail was about 120mm long and 7mm at widest.
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Thanks to everyone for the feedback on this one. Just to say that there is no need to add further identifications unless you disagree with the first one that's been entered. In this case, everyone is agreed that it is a slow-worm, so the best option is to just click on "I agree" against the first identification, by Vinny.
The additional comments are very welcome, but could be added as comments rather than additional identifications.
Having multiple identifications doesn't cause iSpot any problems, it's just not as tidy as it could be! For more on this see:
Entomologist and biological recorder
If you look at the times of the ID's, Martin, the first three were posted simultaneously.
Definitely a slow worm from the size alone. The only other British species it is likely to be are the common and sand lizards; at 12cm the tail alone is close to the whole body size of these two. Slow worms are around 40cm long.
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Slow-worms are not around 40cm long, although they can be.
They are born at 7-10cm long and rarely reach 40cm. Of the reasonable numbers that I have seen over the years, I doubt any have been more than 20-25cm long.
Lat/Lng: 51.2, -0.9
OS grid ref: SU8154