So Wendy . . . (SPOILER)
In the hole that Sophie was keeping the dead bodies, there was the top half of the tall guy from the pub - and NOT Wendy's top half.
Then we heard Johnno say that Wendy had set up the property scheme
Then at the very end we saw Wendy dressed as a cop driving Sophie away.
Does that mean that Wendy and Sophie were in it together and had always planned to kill Johnno? And that he and she are driving off into the sunset with all the money?