She joins Lennie James and Sheridan Smith on Sky’s Portrait Artist of the Year. Plus: reaching the bottom of Britain’s deepest cave. Here’s what to watch this evening8pm, Sky ArtsStressful or soothing? It’s always a fine line between the two with this portrait competition. Art historian Katy Hessel joins the judging team for the show’s 13th series, with Stephen Mangan resuming hosting duties. The first three sitters are actors Lennie James, Sheridan Smith and Vanessa Williams. Who will break down in (happy) tears, telling a painter: “You’ve captured something I thought I’d lost”? Hollie Richardson Continue reading...