It’s World Parsnip Day on 20th November, and one of the capital’s coolest food markets has come up with the most brilliantly bonkers way to celebrate. Market Place, the fast-growing street food hub with locations across London, is teaming up with premium gin brand James Gin to give away free G&Ts – but there’s a quirky catch. To get your hands on a James Gin Asian Parsnip & Tonic, all you need to do is bring a parsnip down to the Market Place Vauxhall site on 20th November. In exchange for your humble root vegetable, you’ll receive a free gin…