The Air Quality (Domestic Solid Fuels Standards) (England) Regulations 2020
New legislation, with regards to the sale of wood sold as a domestic fuel comes into effect on 1st May 2021.
The packaging must have the correct label (as detailed in the Air Quality (Domestic Solid Fuels Standards )(England) Regns 2020 https://www.legislation.gov.uk/uksi/2020/1095/made ) for wood sold in volumes of 2m3 or more.
It is based around the moisture content of wood for the purpose of combustion in domestic premises in England.
Wood is not suitable for burning until it has been dried. You should not burn wood until it has a moisture content of 20% or less. Wet wood contains moisture which creates smoke and harmful particulates when burnt. As well as being harmful to your health and the environment, this can damage your stove and chimney and is an inefficient way to heat your home. Dry it in a sunny, well-aired space for at least two years, keeping rain off in the winter.
Radial cracks and bark that comes off easily suggests wood that is ready for burning. Test the wood when you think it is ready for burning, ideally with a moisture meter. First calibrate the meter and then measure a freshly split surface to get the best reading.