Are there any other reasons I should join the claim?
By joining the claim, you may be able to seek remedial action. If successfully sought, the defendants could be ordered by the Court to clean up affected rivers such as the river Wye and/or significantly reduce polluting activities going forwards. Such measures are likely to be vital to the long-term recovery of the region.
If the claim is successful, you may also be able to seek an injunction preventing defendants from continuing to pollute the Wye, Lugg and Usk catchments. Whilst members of the Avara Foods poultry group have put in place a plan to address the chicken manure produced from its operations and Dŵr Cymru Welsh Water have stated they are investing into their infrastructure, if these plans are ineffective, you may be able to compel these companies to take other steps to prevent future pollution.
In addition, compensation that the defendants may be required to pay should act as a strong deterrent against companies polluting rivers in the future. In particular, it will send a powerful message to the shareholders of these companies and to other companies that the cost of causing pollutions is too expensive.