A mural by mysterious graffiti artist Banksy is to be moved from a garage wall in Port Talbot to a new gallery in the town. Essex-based gallery owner John Brandler paid a six-figure sum for Seasons Greetings, and described it as one of the artist’s most important works.               The graffiti on steelworker Ian Lewis’ garage appeared overnight in December 2018. Contractors begin transferring the piece, painted across two...