Having checked the forum, the following users who had posted on this board have had their accounts removed (the posts are still there, but the users are now listed as "guests"):
theo
ross
tam
Holymanjones
droopdr
Of the remaining 10 or so non-posting accounts that I deleted, I can only remember the name of one of these, and that is diego.
I apologise profusely for my cock up

Unfortunately, these users will have to re-register to regain access to the forum, as the delete function cannot be undone. Sorry for any inconvenience.