By Jessica Frank-Keyes Susan Hall has unveiled her plan to extend the Night Tube to the Hammersmith & City line, if elected mayor of London. The Conservative candidate, who is vying with Sadiq Khan as he campaigns for a record third term, announced her plan today as part of a bid to revive London’s night-time economy. At an event in Hammersmith on Monday evening, where she spoke to businesses, Hall toldCity A.M.: “It’s about getting people back home if they want to stay out late. “I’m hearing women are feeling less and less safe so [with] the Night Tube – especially when I manage to put CCTV c…