By City A.M. Reporter Tube and train fares in London could be reduced on Fridays under a £24m plan announced by Sadiq Khan. The Mayor of London has asked Transport for London (TfL) to run a three-month trial aimed at increasing passenger numbers and boosting the economy by making all fares off-peak on Fridays. This would require the support of the wider rail industry. Peak fares apply on weekdays between 6.30am and 9.30am, and between 4pm and 7pm, on TfL and mainline rail services within London. Someone commuting by Tube from Zone 6 into Zone 1 in central London at peak times currently pays £5…