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London's Sustainable Drainage Proforma

From April 2019, London’s 33 Lead Local Flood Authorities (LLFAs) will introduce the London Sustainable Drainage Proforma. 

This proforma will be required to accompany Sustainable Drainage strategies submitted with planning applications and will form part of planning application validation requirements. It sets a clear standard for the information that should be provided in a Sustainable Drainage strategy for all development in London. The proforma is intended to ensure that key information is provided with the initial planning application, reducing the need to request additional information throughout the assessment process and preventing delays in approval. 

The proformas are available from London’s Local Authorities’ websites or via the GLA website:

This initiative is supported by the Greater London Authority (GLA) and the London Drainage Engineers’ Group (LoDEG) to encourage greater consistency.