The Farming Rules for Water require that applications of organic manures are planned and matched to soil and crop nutrient requirements and to manage any potential risk to water quality. The Environment Agency has published a Regulatory Position Statement (RPS) on the spreading of organic manures (which includes composts and digestates) on agricultural land.
If you follow the conditions of this RPS you can have a plan to apply organic manure to agricultural land that may exceed the needs of the soil or crop on that land, provided there is no pollution risk. To use this RPS you must still be able to show that your planned applications to land do not exceed the crop requirements for the duration of your current planned crop cycle. This RPS will be withdrawn on 1st March 2022, and it does not apply to circumstances that you can avoid or plan for.
You must inform the EA if you intend to use the RPS. This is particularly important as without knowledge that the RPS is being used the EA will have none of the required evidence.
Find out more at
https://www.r-e-a.net/resources/ea-regulatory-position-statement-on-spreading-organic-manures/