The Bunch of Grapes pub, Pontypridd, was triumphant in the Best British Roast Dinner competition 2016. But will a Welsh pub lift the title again in 2017?   Nick Otley, owner of Bunch of Grapes, said: “We’ve always been busy, but since winning the Best British Roast Dinner competition we’re taking bookings for Sunday service weeks in advance. It’s inspired us to become even better.”   All pubs have to do to enter the national competition is fill in a…