The BBC have announced plans to launch five new, free HD TV channels by next year.
The new channels set to broadcast are BBC News HD, BBC Three HD, BBC Four HD, CBeebies HD and CBBC HD.
Whereas some previous HD channels from the Beeb have acted like a high-definition "greatest hits" roll for the broadcaster, with hand-picked HD programming, the new channels will instead be high-definition simulcasts of existing BBC channels. Altogether, the new channels will account for 250 hours more of free HD content than is currently available through free TV services.
BBC Three HD and CBBC HD will be broadcast on the BBC's existing high definition spectrum, with the remaining new channels broadcast on a new multiplex made available by Ofcom following the digital switchover.
As many as a further ten HD channels could be hitting terrestrial airwaves following the switchover.
The BBC have also announced plans to roll out regional versions of BBC One HD and BBC Two HD for Scotland, Wales and Northern Ireland.