Silverlink

Rail Maritime and Transport union (RMT) members at Silverlink are being balloted over strike action after they rejected a pay offer by 66 to 55.

The union had recommended they accept the offer, worth 3.3% from last June, 3% from this June and a cut in the working week.

Docklands Light Railway

RMT staff on the DLR will also be balloted - this will be co-ordinated with a ballot of London Underground (LU) train drivers who are involved in a separate pay row.

Any industrial action will be launched against the two companies at the same time, potentially causing huge disruption in London.

The RMT has rejected a 4% pay offer on behalf of its members at DLR who work as train "captains" on driverless trains.

It is arguing that the "captains" salaries of �22,300 are below the average in the capital and worse than LU staff.

Arriva Trains Northern

Members of the RMT have announced a further 48-hour strike on 5 and 6 February.

The action will affect services in an area bounded by Sheffield in the south, Bewick-on-Tweed in the north, Merseyside in the west and the east coast.

In the North West, it will halt connections in much of Tameside, Rochdale and the key Manchester Airport link.

Train services between Manchester and Liverpool will also be hit. Merseyside's local network Merseyrail will not be affected as it is run by a separate company.

The union wants a 22.5% rise in their basic pay to reduce the pay gap between guards and drivers, but the company has offered 8%.

South West Trains

They are holding another 48-hour strike over pay.

The company has offered staff a 7.6% pay increase over 18 months which has been rejected.

Scotrail

Drivers' union Aslef is balloting members on 24-hour stoppages as part of a campaign to win parity with drivers in other regions.

Drivers have been staging an unofficial overtime ban since the end of December.

ScotRail has been forced to introduce an emergency timetable.

The company has offered a basic increase of 3% with a further 5.2%, which would be conditional on the unions agreeing to more flexible working conditions.

Connex South Eastern

No strike action yet but trouble is brewing.

Members of the RMT union heavily rejected a pay offer in a referendum and it is now seeking further talks with management.

They would have to hold another ballot before any industrial action could be taken.

The company operates trains into London from south-east England.

London Underground

A ballot of London Underground train drivers will be co-ordinated with the Docklands Light Railway who are involved in a separate pay dispute.

Any industrial action will be launched against the two companies at the same time, causing huge disruption in London.

The drivers' union Aslef has accused London Underground of going back on a deal last autumn which stopped strikes by thousands of workers.

Workers were given a 4% pay increase but Aslef wanted a further payment to close the gap between the wages of Tube drivers and staff who drive engineering trains at night.

Tyne and Wear Metro

A series of one-day stoppages are planned on the Tyne and Wear Metro, which serves Newcastle, Gateshead and the North East coast.

Aslef called the strikes after turning down a pay offer of 3%.

Nexus, which runs the Metro system, said it was disappointed by the strike threat as arrangements had already been made for further meetings with the union.

The first strike is due to be held on 4 February