In October 2019, following a consultation about control of the invasive American Signal crayfish which has devastated our native variety, DEFRA abruptly withdrew all trapping licences and made it illegal to sell live crayfish in the UK. They are unconvinced that trapping is an effective control method. As there are no processing facilities here it effectively killed the trade. There are reports that the ban is being ignored in some places.
Please be aware it is now an offence to buy live crayfish