First two episodes aired on Sat last and complete series available on iPlayer. Have watched 4 of the 6 episodes so far and am finding it quite intriguing. Set in Ireland and Belgium, it begins with a routine drugs raid in Ireland "which reveals that the dealer has been receiving substantial funding from a seemingly untraceable source - not in cash, but in rough diamonds." The diamonds are linked to a series of bombings in Belgium and the Irish and Belgian police forces work together to unravel who is behind said bombings.
A decent watch.
Watched the first three episodes back to back last night. Had to force myself to switch off the TV and go to bed at 1 am. Really got me hooked so thanks Ken4155 for the heads up.