Labour threatens to shut down rivers over policies

It seems like you're referring to a recent news article or development. Labour, in this context, likely refers to the Labour Party or a labor union, which is threatening to shut down rivers over certain policies.

Could you please provide more context or information about the specific policies or issues that are causing the labour union to take this stance? This will help me better understand the situation and provide a more accurate and informed response.

Additionally, it would be helpful to know which rivers are being threatened to be shut down and what the potential consequences of this action might be.