Severe rush hour delays across Tube network after Waterloo closure and signal failures

There are major delays across some tube lines this morning across London (Picture: In Pictures via Getty Images)Commuters are facing disruption this morning after a fire alert forced London Waterloo to be shut while several Underground lines are facing major delays.TfL said Waterloo was temporarily closed just before 6am after a fire alert.It said in a statement: ‘This station is closed while we respond to a fire alert. Tickets are being accepted on London Buses via reasonable routes.&rsq