small lizard 2 inches long
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I think this is the most likely ID but i am aware that some Smooth Newts have on occasion also had unspotted throats hence the lack of 100% certainty.
I think you can pretty confident this is a palmate newt. The smooth newts I have seen with unspotted throats have all tended to be very pale animals, unlike this. However, there is always some room for error!
Lat/Lng: 51.0241, -3.0923
OS grid ref: ST234255