On the
Anna Raccoon Archives website there are 39 blog posts filed under "Mark Williams-Thomas" in the list of categories down the left-hand side of the page.
It would also be possible to use Google to search for mentions of his name on the site, e.g. by entering "MWT" site:annaraccoon.com or "Mark Williams-Thomas" site:annaraccoon.com in the search box.
Judging from the "About this site" page, it will be a year this coming Saturday since she died. I wonder what she'd have made of recent developments.