@FuckTheCheeseHandler
When Kate spoke to the chis handler, she made a point of calling him Sarge. When jo was in talking to her gaffer, Kate was on the phone. She said ‘how do you spell that?’ And then ‘thanks for getting back to me sarge’ (or words to that effect). Did anyone else think the handler changed his mind and gave her the name or have I got it wrong? Please don’t be a bent bastard Kate!
So glad someone else picked up on that!
It immediately pricked my ears due to the repeated use of Sarge so soon after she was talking to the handler where she addressed him that way.
The scene obviously then developed into Kate bringing Jo the info on the surveillance mistake. I just wonder what she might need someone to spell out for her if that was the conversation she discovered the lapsed surveillance?
I have no doubt that this is no coincidence. However, was that snippet of conversation added as a clue implicating Kate? Or left ambiguous as a red herring to draw suspicion? Given how little attention it has attracted, I'm beginning to think it's the former 
I hope not though! I don't want Kate to be corrupt 