Picture credit: Baby Cow Ltd   It will all be occurrin’ in Barry this Christmas, with Gavin & Stacey star Ruth Jones set to switch on the town’s festive lights. Nessa Shanessa Jenkins will return to the seaside town for the annual Christmas lights ceremony in King Square, Holton Road, on November 23, ahead of the hotly awaited Christmas special of the much-loved show. The switch-on will mark the end of a two-day festive market in Barry on Friday, November…