Social media links updated

Icon/picture links to Facebook, Flickr, Twitter, Instagram and Groups.io (used to be Yahoo groups) have been updated and appear at the top right of every page.

We have had to use the Cogs icon for the Groups.io because (for some reason) groups.io does not have a recognisable icon of its own.

Created: 13 May 2020
Modified: 31 Oct 2022