From: www.sciencealert.com/scientists-reveal-why-you-should-never-take-pebbles-from-the-beach
It is a law enshrined in the 1949 Coastal Protection Act, curbing historic losses of hundreds of thousands of tonnes of sediment from beaches by people extracting "free" sediment for building materials.
commercial level activities are mentioned early on as the very raison d'etre for these laws existing, and> There are extensive areas in the Solway Firth
doesn't appear at all in the sciencealert.com version linked, nor in the original at https://theconversation.com/why-you-shouldnt-take-pebbles-fr...