@geraldh: You can try accessing the free OS maps online using Pale Moon via 'The Hug' at:
https://maps.the-hug.net/
AFAICS these OS maps are still being provided '
free for leisure use'... if interested see more involved discussion of OS maps, changes, charges, and other UK-wide mapping on The Hugs' website... e.g. here:
https://www.the-hug.co.uk/opus2659.html
"OS OpenSpace was Ordnance Survey's first venture into mapping APIs when launched in 2008 and here at the Hug we embraced it and used it to create the still very popular maps.the-hug.net which offers free access to OS 1:50,000 mapping in our GPS mapping application."
PS. Left-field if not downright bizarre name for a mapping website? A challenge for SEO?
