Two staff members at Transport for Wales are set to star in a new BBC Wales series exploring the hidden world of night shift workers. Lynne Bartlett and Andrew French, both from Cardiff, are members of Transport for Wales’ Train Presentation team and spend hours every night preparing the carriages for the 12,000 commuters who use the network every day. The grime fighting duo, who between them have spent more than 30 years working the night shift, will now star…