123reg again...
I know this thread is ancient but someone might find it...
Having already moved all my .co.uk names away, next I tried to transfer my "free" .uk names away from 123reg. Most worked OK but for several they won't release the tag, no explanation just an error message. Not tackled the issue with support yet.
Can't register the names with my other registrar although they now hold the corresponding .co.uk
Biting the hand that feeds IT
