By Charlotte McIntyre Antiques Roadshow viewers took against a Rolex valuation on the BBC show. The long-standing programme, hosted by Fiona Bruce, visited Alexandra Gardens in the heart of Cardiff on Sunday. Expert Alastair Chandler was thrilled to hear the story of an unusual Rolex watch as he shared with the owner whether the piece was a fake. Explaining the provenance of the watch, the guest said: “It’s a watch belonging to my father who passed away just before Christmas. My father was a welding lecturer from the 60s to the 80s and mid 70s, he had a student arrive from Oman. “Lovely boy, m…