Des Davidson from Shepperton has contacted me about my column describing the activities of the Upper Thames Patrol, a branch of the Home Guard during the Second World War, who were given the responsibility of defending the locks, weirs and bridges on the river.
You probably wouldn’t think a small shellfish would be much to worry about in the great scheme of things – but then you might not ever have heard of the quagga mussel and the impact it can have when it gets into a waterway.
