By Jasmine Allday David Leon has opened up about his surprise return to ITV drama Vera, 10 years after he first left. The fan favourite is back as DS Joe Ashworth for the upcoming series of Vera after Kenny Doughty, who played DS Aiden Healy, stepped down following the Christmas special. Joe’s return spells trouble for Vera, as he reveals just why he’s back and what’s been going on in the last decade or so that has brought him full circle and back to his first boss. Speaking ahead of his return, David revealed just why he agreed to come back after so long – and what it meant to be working alon…