River Derwent: Agency removes illegal crayfish trap - BBC News

Frontiers The Impacts of Recolonisation of an Urbanised River by Native and Non-native Species

National Trust creates Northumberland 'ark' to protect endangered crayfish, Endangered species

North York Moors: Invasive crayfish seen in River Esk

Environment Agency seizes illegal traps threatening crayfish and eel

Leicestershire Crayfish

Two found illegally catching crayfish in Derby city centre - Derbyshire Live

Blue lobster: Belfast Lough fisherman lands rare crustacean - BBC News

Norwich's 'much-loved' otter found dead in illegal trap - BBC News

How to Catch Signal Crayfish in the UK

White-clawed crayfish The official blog for the North York Moors National Park

PDF) Conservation of British white-clawed crayfish (Austropotamobius pallipes) using Ark sites

Environment Agency: 'Invasive disease kills UK crayfish' - BBC News

Sheffield Lakeland Landscape Conservation Action Plan

Environment Agency delivers warning to anglers tempted to use illegal crayfish traps