In this week's #SecretsOfTheLondonUnderground, Tim Dunn gets incredible access to the maintenance depot at Northumberland Park, responsible for looking after the entire fleet of Victoria line trains… Watch Tuesdays at 8pm on U&Yesterday and stream free on U. | U&Yesterday

14K views · 135 reactions | As #SecretsOfTheLondonUnderground returns to Yesterday for a BRAND NEW series, rail historian Tim Dunn visits Earl's Court in Tuesday's episode... which was the very first station to install a passenger escalator! | U&Yesterday | Facebook

In this week's #SecretsOfTheLondonUnderground, London Transport Museum's Siddy Holloway heads to London’s youngest terminus station, Marylebone, and in this EXCLUSIVE clip, has been given special access to its emergency spiral staircase... Don't miss BRAND NEW episodes, Tuesdays at 8pm on Yesterday and UKTV Play. | U&Yesterday

In this week's #SecretsOfTheLondonUnderground, London Transport Museum's Siddy Holloway does a night-time track walk to access the now-disused tunnel at Finsbury Park which was part of an early experiment to run large electric mainline trains on the tube. Watch Tuesdays at 8pm on U&Yesterday and stream free on U. | U&Yesterday