Through Googling - and luck - I've known about Paul being "the new guy" for awhile. However, I held back posting since I thought ITV might make an official announcement (crazy! :p) and also talking about Jamie's replacement (sniff) was a pretty huge spoiler. But "Survivor's Guilt" airs Wednesday and BBCA confirmed what's about to happen by releasing that clip as much as anything could, so I thought now was the time to share.
Finally, one of the sources for putting two and two together was the website of costume designer Ray Holman, who worked on Series 5 & 6 / Season 3 of Law & Order: UK. On his photo page, is our first look at Sam and Ronnie.