The media regulator Ofcom has approved a plan by the BBC and Arqiva to sell off some of the multiplex capacity.
This freed up space should allow for the creation of two new national TV channels to be broadcast via digital terrestrial television (DTT).
The space will become available throughout the UK following the completion of the digital switchover in 2012.
This will free up space on the multiplex B used by the BBC for its HD service, while space on the multiplexes C and D with Arqiva will become available following technical updates.
This free space can be combined to offer enough capacity for the two new channels on the Freeview platform.
It is believed that this space could even be sold off and used before the digital switchover is completed.