https://www.gov.uk/guidance/flood-risk-assessments-climate-change-allowances
Flood risk assessments: climate change allowances - GOV.UK
When and how local planning authorities, developers and their agents should use climate change allowances in flood risk assessments.
flood risk assessmentsclimate changeallowancesuk
https://www.gov.uk/guidance/using-modelling-for-flood-risk-assessments
Using modelling for flood risk assessments - GOV.UK
When to use hydrological and hydraulic modelling as part of a flood risk assessment for a planning application, and the expected standards.
flood risk assessmentsusingmodellinguk