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When it comes to preventing surface water pollution, Scotland leads the way. Scotland’s wide-scale use of sustainable drainage systems has delivered more installations, more examples of best practice – and probably more lessons learned – than anywhere else in the UK.

Scottish regulations and guidance have prioritised surface water quality for more than 10 years, when elsewhere policymakers, particularly in England, have focused on controlling water quantity. It’s easily overlooked that although surface water causes flooding, it also causes pollution, and the principles of SuDS, quite rightly, put quality and quantity on an equal footing.