It is, maybe they just aren't bidding for the HD rights. But as an example, when a big boxing match has been hyped and will air soon-ish. You'll find companies like Sky, TalkTalk, etc have secured HD broadcasting rights for it but VM is only selling it in SD. It's like that every time.
- - - - - - Any opinions expressed by myself are entirely my own and do not represent Virgin Media in any way.