Digital Switchover
Starting in 2008 and ending in 2012, TV services in the UK will go completely digital, TV region by TV region. This process is called digital switchover. The UK's old television broadcast signal (known as "analogue") is being switched off and replaced with a "digital" signal. Any TV set that's not converted to digital when the switchover takes place will no longer receive TV programmes.
Only by completely switching off the analogue signal will the whole of the UK gain access to the increased picture quality, extra channels and interactivity that digital television offers. Switchover will also free up spectrum to introduce exciting new services such as high-definition television (HDTV) and mobile TV.
Please find below region and switchover
Whitehaven Cumbria - October 2007
West Country, Granada - 2009
Wales - 2009 - 2010
West, STV North - 2010 - 2011
STV Central - 2010 - 2011
Central, Yorkshire, Anglia - 2011
Meridian, London - 2012
Tyne Tees, Ulster - 2012