Disruption is expected from today as ASLEF stages pay strikes at Avanti West Coast, East Midlands Railway, West Midlands Trains and CrossCountry.
Further strikes have been called tomorrow at Chiltern Railways, GWR, LNER, Northern and TransPennine Express, and at c2c, Greater Anglia, Govia Thameslink Railway, Southeastern and South Western Railway (main line, depot drivers and Island Line) on Monday.
ASLEF drivers are also refusing to work rest days from 4 to 6 April and from 8 to 9 April, which could lead to some services being changed or cancelled.
However, strikes which had been set to go ahead on London Underground on 8 April and 4 May have been called off after progress with talks, although a separate walkout is still planned on LNER on 20 April, accompanied by an overtime ban from 19 to 21 April, in a dispute over bargaining procedures.