Lead responsibility for managing surface water flood risks, including understanding the contribution of local drainage systems, lies with Lead Local Flood Authorities, in this case Cumbria and Lancashire County Councils.
Section 19 of the Flood and Water Management Act 2010 requires Lead Local Flood Authorities to investigate floods in their area.
Lancashire and Cumbria County Councils published flood investigation reports following the Storm Desmond related flooding in 2015-16. These reports cover the role of local drainage systems and include actions.
They are available on the council’s website: https://www.lancashire.gov.uk/council/performance-inspections-reviews/environmental/flood-investigation-report/.