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The website has been migrated to Drupal 7.
The previous version of the site, which was released in 2010, was built in Drupal 6. Drupal 6 reached 'end of life' in early 2016 meaning it was no longer supported and any security problems would not be fixed.
All the old content (over 10 years worth) has been migrated. If you think anything is missing then let me know. The old version has been archived.
The new version has a slightly different appearance and uses a responsive layout, which means it can be read easier on a mobile phone or tablet.
If you have any questions or comments or suggestions, please post them here, in the forum.
Andrew