By Christine Smith When Beth Cordingly was offered a part on Emmerdale, she didn’t have to look far for advice. Her partner, Ian Kelsey, is himself a veteran of the ITV soap, playing Dave Glover for three years in the 1990s. So Beth knew he would be the perfect sounding board when she was considering whether to take on the role of feisty troublemaker Ruby Milligan. Ian, 57, her partner of three years, encouraged her to go for it – along with her parents and daughter. Beth, 47, says: “Ian was really supportive and wanted me to do it, which is lovely. “There is that thing as an actor where you a…