You want Correx type sheets. Antinox & Proplex are other names to look at. And there's plenty of copies. Fit with a Stanley / big scissors and duct tape the joins. Something like this:   https://intersiteuk.com/products/black-fluted-temporary-protection-board-2500-x-1200mm-x-2mm?utm_medium=cpc&utm_source=googlepla
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