National Grid Wireless and Arqiva are providing the test as part of the process to allow DVB-T2 to launch on multiplex B in each switched-over region, starting with 2009.
It is not expected that you will be able to buy a "reasonably priced" Freeview HD box until 2010. However, the standard uses standard software components so it may be possible to use Windows Media Centre with a suitable MPEG4 codec with a suitable DVB-T USB receiver.
Justin Mitchell, leader of the DVB-T2 development team at BBC Research and Innovation, said: "We are delighted that our team, in collaboration with our partners, has been able to deliver such a key piece of technology in such a short timescale. This is a big step forward in enabling the introduction of full HD terrestrial on Freeview by the end of 2009."