You may already have come across it, but there's a book about life in the Forest of Dean during WW1 written by Gladys Duberley. It's called 'Heaven lies about us' - you should be able to pick up a copy on the main secondhand book websites such as World of Books or AbeBooks.

Her son is a keen family historian and has a website: https://www.nickduberley.com/

By strange coincidence I have a family connection to the cottage in Soudley myself, so it was lovely to read about the place. Looking some more at the website I think the book can be downloaded for free, in different sections.