If Ted is going down, I will throw myself on the pyre with him.
Other than that, I am sticking to a (slightly adapted) version if my original theory.
Ros and Hilton set up the abduction of Hana in order for her to close the case (Staged BM may even have been Hilton himself or another fella they paid) Lakewell had mentioned Farmer to her in the past - saying he wasn't very bright, etc, and Ros remembered this and decided he was an easy target for framing.
Ifield suspects this third abduction was a set up and so went to see Hana at work to try to gather evidence to prove his theory.
Ros talked Ifield down after she came round face-to-face with the chainsaw and then killed him. She called Hana to come and help her to clean the murder scene, perhaps offering her more money on top of the money from the staged abduction.
So far she has fitted up Farmer, killed Ifield, stitched up Hana, and now Nick. (I am buying into Nick and Lake well being innocent for now).
I don't think we will find out who the real balaclava man is.
A third BM (4th if you count Ifield's short turn as BM), attacked our Steve. Hhhmm, still pondering who this might be...
My main question is what was Hilton blackmailing Maneet with? What made her (clearly unhappily) become his mole? And who else will Ros throw under the bus: Farmer, Hana, Ifield, Nick...who next? Hilton? Jodie?
My shock of the episode was Jodie driving, I didn't think she was old enough.