Northern rail workers have walked out in a 24-hour strike.
Members of the RMT union are protesting over driver-only operated trains, arguing that passenger safety would be put at risk with the loss of guards.
The rail company said driver-only operated trains are widely used elsewhere.
The strikes, which started from 7.00am in the morning and are due to last until 7.00pm this evening (26 March), has seen the usual weekday service reduced by around 50%.

Two Arrested After Police Raid in Oldham
Keighley Leisure Centre Pool to Close for Maintenance
Bradford Drug Gang Jailed for Over 100 Years
Pair Jailed After Violent Leeds Burglaries
Sutton Schoolboy, 12, Becomes Britain's Youngest International Chess Master
Vandals Target Recently Reopened Wellholme Park in Brighouse
Bradford's Lister Park Lantern Parade Returns for Spectacular Celebration of Life
Further Man Jailed for Seven Years Over £266 Million Bradford Money Laundering Operation
Ajay Devgn's Drishyam 3 Reportedly Crosses ₹300 Crore at Indian Box Office
More Than 1,000 Dockless Bikes Seized in Westminster as Council Issues £450,000 in Penalties
Blackburn with Darwen Family Hubs Awarded Gold Certification by Young Inspectors
Man Arrested After Woman Seriously Injured in Three-Vehicle Collision on M62
Remix Saturdays
Bhangra Nights
Legal Show
The Golden Era