Six species of reptiles breed naturally in Great Britain: three snakes and three lizards. In addition, one snake and two or three lizards have become established (naturalized). Sea turtles have been recorded as coastal vagrants and the red-eared terrapin occurs as an introduced species.
- British Reptiles from wildlifetrust.org.uk
- RAUK Identification Guide
- Rhodin, Anders G.J.; van Dijk, Peter Paul; Inverson, John B.; Shaffer, H. Bradley; Roger, Bour (2011-12-31). "Turtles of the world, 2011 update: Annotated checklist of taxonomy, synonymy, distribution and conservation status". Chelonian Research Monographs 5. Archived from the original on 2012-01-22.
-  Wilkinson, J.W., Baker, J. and Foster, J. Priorities for Non-Native Amphibians and Reptiles in the UK. ARC Research Report 11/02.