I believe it was deemed to be too problematic given that there were customers on the three legacy domains, eg blueyonder, ntlworld and virgin.net, where potentially the first part of the email address was the same.
Virginmedia was the new name following the merger of NTL and Telewest and their acquisition of Virgin Mobile.
_________________________________________________________ Graham I am a VM customer. There are no guarantees that my advice will work.
As a Very Insightful Person, I'm here to share my knowledge. I don't work for Virgin Media.