It turned out that the concrete was made using beach-sand that was not properly desalinated, rather than more expensive quarry-sand.

ECONOMIST: The land of disappointments | The

If approved the quarry would release five million tonnes of new sand and gravel reserves.

BBC: Ducklington's Gill Mill quarry expansion planned

The quarry is owned and run by Cemex, which extracts sand and gravel from the site.

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The sides of the quarry, where people were illegally digging for rocks and sand for use in building materials, caved in after heavy rains.

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