These pages have not been maintained for a long time now, and I am sure that many of the links no longer work. But maintaining the pages is not just a case of bringing the links up to date (and deleting those which don’t work), but more importantly would require me to scour the web for new links to add.
I have always thought that a carefully curated page may be more useful than the result of a Google search, but the margin is becoming smaller. So reluctantly I have decided to remove these pages.
They will go at the end of this year. Please let me know if you have any comments or suggestions before then.