By Lawrence Matheson A rail union has warned that South Western Railway workers could take industrial action because of a dispute about work times for control room staff. The Transport Salaried Staffs’ Association (TSSA) said its members at South Western Railway (SWR) could take strike action over the new work times if an agreement is not reached. Gareth Theobald, who works for TSSA at SWR, said: “This isn’t merely a shift in working patterns, it’s a stark deviation from well-established norms and we urge SWR to return to the negotiating table without delay to resolve this issue. It’s vital th…