Finding good quality topsoil has never been more difficult! There are many new criteria that topsoil must meet to meet a British standard. Topsoil can vary from source to source but all certified topsoil must reach a certain specification. The BS3882 2007 topsoil certification is now the benchmark industry standard.
BS3882: 2007 This specification is the most used in the construction industry. The testing is quite rigorous and not easy to pass but this latest example asks for available plant nutrients which separates topsoil from subsoil. There are various other mixes of topsoil that can b e purchased, and many topsoil supplier will custom make you soil.