Train passengers are being hit by major disruption due to the largest strike by rail workers for a generation.

The action by thousands of members of the Rail, Maritime and Transport union at Network Rail and 13 train operators officially begins at 7.30am today, but many services were hit from Monday night.

Around 40,000 members of the Rail, Maritime and Transport (RMT) union at Network Rail and 13 train operators have walked out.

Here is a breakdown of operator’s plans for strike days across the region.

– Avanti West Coast

A limited service of around a quarter of the normal timetable will operate, and only between 8am and 6pm.

A number of routes will not be served, such as to North Wales, Stoke and Edinburgh.

The operator has suspended ticket sales for travel between Tuesday and Sunday to “help reduce disruption and overcrowding”.

– Caledonian Sleeper

All departures are cancelled between Monday and Friday.

– Great Northern

There will be very few trains on strike days, with no services east of Ely to King’s Lynn.

An amended Sunday service will be in place on the days after strikes.

– Merseyrail

There will be no train services and no rail replacement buses on strike days.

– Northern

Passengers are urged “not to travel” between Tuesday and Sunday as services will be suspended “on most routes” during strike days, and there will be a “significant impact” on non-strike days.

– ScotRail

No trains will run north of Glasgow or Edinburgh on strike days.

Just two trains per hour will run between the cities via Falkirk.

– TransPennine Express

There will be a “significant reduction in available services” on strike days.

Several stations will be closed, such as Middlesbrough, Scarborough and Selby.

There will also be significant disruption on Wednesday and Friday.

– Transport for Wales

Most lines will be closed on strike days.

On Tuesday and Thursday, a reduced service will run between Radyr and Treherbert, Aberdare and Merthyr Tydfil, with replacement bus services between