Just a quick update as I noticed that I had not included the TV channels that are available live via ExpatTV on the xbmc programme.
Basically you get the main terrestrial channels which are as follows
BBC 1 and 2
ITV 1 2 3 and 4
BBC 1 Northern Ireland
Apart from these via other plugins and a bit of searching you can find most channels live including some of the Irish channels too.
On top of this most series can be found using Mash Up TV or 1 channel, in fact recently I managed to find the series Orphan Black, plus the episodes which had not even aired yet on the BBC