The National Planning Policy (NPPF) states that 'flood risk' is a material planning consideration, and that when you apply for planning permission it is your responsibility to assess and mitigate risks by carrying out a flood risk assessment (FRA).
If a FRA is not received your application may be treated as invalid, and the local planning authority can refuse planning permission for development if the FRA is not suitable.
Prepare a flood risk assessment
Guidance on how to prepare a suitable FRA can be found in the British Standards: Assessing and managing flood risk in development - code of practice (BS 8533:2011)
Local flood risk strategy
The local flood risk strategy provides concise information on flood risk issues to assist planners in the preparation of the Local Development Framework (LDF) and in the assessment of future planning applications.
It assesses the different levels of flood risk in the York area and maps these to assist with statutory land use planning.
It's also intended to be used by the general public and those wishing to propose developments, as a guide to the approach that local planning authorities will follow in order to take flood risk issues into account in a sustainable manner.