Brenda Blethyn has given fans a taster of what to expect in the final feature-length instalment of Vera series 13 this weekend. Titled Salt and Vinegar and written by episode two’s writer Phil Mulryne, the third film in the series promises to see the latest run out with a bang. While Blethyn hasn’t revealed too many plot points, the 77-year-old has discussed how the season finale will show a “different” side to DCI Stanhope. “There’s a scene where she is out doing the gardening at her cottage,” Blethyn said of the finale. She continued: “The script called for ‘relaxed Sunday clothes’. So Vera …