For more on this species see: Beebee, T. & Griffiths, R. (2000) Amphibians and reptiles: a natural history of the British herpetofauna. Harper Collins Publishers Ltd., London.
For details of how to get involved in conservation of amphibians and reptiles in Britain see The Herpetological Conservation Trust:
http://www.hcontrst.force9.co.uk/