​Without swift bricks there is no guaranteed nesting habitat for birds reliant on building cavities anywhere in the UK – and there never will be. We are inadvertently destroying their oldcavity nesting sites through renovation, demolition and insulation, while climate mitigation measures mean modern buildings will never provide natural homes for birds.

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Hannah Bourne-Taylor is leading a national campaign to make swift bricks compulsory in UK building regulations. 

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See Hannah's website with more info. and resources, and feather speech here and see BBC coverage here