I searched the Codex and Googled (probably missed the solution but I was tired by then!) but then found a solution by trial and error. I'd inserted my own styling for site generator and site info in my CSS. Internet Exlorer failed to show anything but Fire Fox showed exactly what was expected. Eventually I deleted #colophon from the CSS which solved the problem. I have developed my site from WP2010, learning from zero as I go. Many detours into the swamp but at the moment I am on a dry trail to the sunny high plains! WP is wonderfully liberating! Thank you all.