As standard we cut our logs to 6-8 inches long, these are intended for ornamental or woodworking projects. If you wish to burn them they will need seasoning (drying) to below a moisture content of 20% https://www.gov.uk/guidance/selling-wood-for-domestic-use-in-england#:~:text=You%20can%20only%20supply%20or,content%20of%2020%25%20or%20less.