Vanessa Bowman paints the world around her: the 19th-century village church, her back garden, the leaves on the trees in the fields where she walks her dog. Once she has chosen a scene from her rural Dorset idyll, she puts brush to canvas, sometimes poring over the details for days in her studio. Over three decades she has honed a unique style and earned a loyal fanbase, with 20,000 followers on Instagram and commissions from House & Garden, Prince Charles’s Highgrove shop and Farrow & Ball. But when she received…