The free-to-view satellite service from the BBC and ITV launches today and is the first in the UK to offer free High Definition (HD) programming. The BBC's trial HD channel will be joined in a few weeks by ITV's HD channel.

With around 80 channels, 'Freesat' is a free satellite based service that requires users to install a dish and set-top box. The BBC have offered the 'Freeview' service now for a while with users gaining access via their existing TV aerial. Sky satellite subscribers wishing to use the service may be able to use their existing kit and unlike Freeview, Freesat has the advantage of being free from bandwidth restrictions and can reach more than 98% of the UK population.

The great advantage of 'Freesat' is that being a satellite based service, it is free from bandwidth restrictions. Freesat will offer HD programming from the outset. Although the BBC's trial channel will be the only HD fare available initially, it will be joined within weeks by ITV's HD service.

High definition Freesat receivers will cost around £120 while their Standard Definition equivalents will cost around £80.