The Publicly Available Specification 100 (BSI PAS100) for composted materials developed by the Association for Organics Recycling (AFOR) is the minimum specification that composted materials must meet. It is a way of evaluating the safety, reliability and consistency of compost. This is required in order to achieve the independently verified Composting Association accreditation.
Alongside the regulatory testing for compost, Eurofins Agro Testing UK can also test compost for various components to help you determine the quality.