This document was initially created in January 2020 by Charlie Bigley of Stoke Newcastle Ramblers, in the hope and expectation it can be further enhanced and corrected over time. Please do not hesitate to point out errors or omissions, and feel free to draft additional information for inclusion in a later version.
Copyright © 2020 Charlie Bigley
Permission is granted to copy, distribute and/or modify these documents under the terms of the GNU Free Document Licence, Version 1.3 or any later version published by the Free Software Foundation.+