Chris here, again!
More thanks to Primeval forum member "Luckyhannah25" for providing us with a link with set pictures from an episode of Primeval.
They all feature three of the main actors/characters; Andrew-Lee Potts (Connor Temple), Hannah Spearitt(Abby Maitland) and Ben Mansfield (Captain Becker). Also Abby seems to be carrying a bag with the handle of a big knife(?) sticking out.
Finally I would like to draw your attention to the new ARC symbol(bottom right) as seen in Episode 3.9 in the future ARC.
You can see more of the pictures here.