Thanks Nutty. I watch few TV series due to never having got into the habit thanks to civvy airline rosters and the joys of programming VHS recorders while lying full length on the floor.
Nevertheless I did watch the previous series and can only add to the praise heaped on it above. I hope that my Freesat PVR will now allow instant selection for recording the series (doesn't always, and then I have to fall back on managing to remember when and where it is on, a most unlikely successful outcome!).