Conductors on Northern Rail train services are staging a second day of strike action in a dispute over pay.
The Rail Maritime and Transport (RMT) say about 1,000 staff are taking part in the walk out, which began on Monday, until midnight.
It wants conductors to receive double pay for working on bank holidays.
Northern Rail is operating a limited service until 1800 GMT in Lancashire, Merseyside, Greater Manchester, Cumbria, the North East and Yorkshire.
The train operator has said it is disappointed by the strike action.