In England, the Environment Agency and IFCAs are responsible for enforcement; the telephone number is the same:

Incident Hotline (24 Hour Service)

England / Scotland: 0800 80 70 60

  Wales:  0300 065 3000

 Ireland:  1890 34 74 24

Best advice is to immediately report any suspicious activity. Activities such as launching a boat from a trailer in the countryside are obviously suspicious, as well as placing nets across small inlets and in rural areas. Much illegal fishing is done from kayaks or from the shore, or maybe by someone using a rod and line. Many estuaries, especially in the South West, are bass nursery areas and have their own byelaws applying to recreational and commercial fishing. In Cornwall (Cornwall IFCA) and Devon, Somerset and Gloucestershire (D&S IFCA), recent byelaws make virtually all netting in harbours and estuaries illegal. Laws regarding salmon and sea trout are applicable from fresh water all the way out to six miles. If you are suspicious, please report the incident. It is also worth considering the Minimum Landing Size requirements (MLS), now more often called the MCRS (Minimum Conservation Reference Size).