Thanks to some lovely people who thought it would be a jolly jape to infect the site with malware, we have had to roll back the site to a state we know is safe.
Unfortunately we only had a limited number of recent backups and couldn't determine when the miscreants performed the evil deed which has meant we have had to roll the site back to a copy taken in Summer 2013.
This means that some content has been lost and some is out of date, but at least the site is up and running again.
We have also had to wipe the entire user database and urge anyone who had registered with the site to change their passwords on any on-line system they access, especially if they have used the same password in each case.
We don't know if the user database was compromised but we have to err on the side of caution.
Please feel free to raise any curses against the miscreants although personally I think being hung by the scrotum would make an excellent punishment.