I have finally got the SPC website up and running – after a fashion. I had made the mistake after the last upgrade of the CMS of not archiving a complete copy. “Let that be a lesson to you!”, I hear in my head constantly as I do this. Always do backups.
The result is that, having re-installed the CMS and the template, I am slowly restoring the miscellaneous pictures and audio files to the right places. Give it a few days and we should be right as rain.