I found this series searching the web for political drama. Watching it is a very positive experience.
Filmed in 2011 or so the setting is UK in the present time. Lots of unfortunate events happen at one time. The 4 part series is about the political reaction to those events. Happenings and reactions are realistic enough to be relevant although cutting it fine on the dramatic side. Most relevant modern popular political topics are in the series, like terrorism, government surveillance, political infighting and moneys effect on politics.
Minuses are few, the biggest one being the series being way too short and compact :) Other minuses are ambiguities here and there and some minor connections between people and issues that seem a bit strange.
Acting is overall good. To me especially Gabriel Byrne playing the leading role does well.
In short this is must see if you like political drama.