We are actively developing this site and our supporting sites -
We are adding Pages to these sites as our ideas develop.
The Headings are recent articles
The draw-down pages are supplementary articles written over the years.
Where the article is date-sensitive, the date of origin is given.
Throughout the websites, we give a note where pages have been written by a third party.
Otherwise pages, sketches and diagrams have been produced by the authors of the site