Half the rail network is closed in England, Wales and Scotland as part of a second rail strike in a week.
Only 20% of services are expected to be running, and some areas will have no trains at all
Tens of thousands of rail staff are taking action over pay, redundancies and changes to working practices in the biggest rail strike in decades
The most recent negotiations between the RMT union and employers broke down on Wednesday
The RMT accused ministers of wrecking talks by refusing to allow Network Rail to withdraw redundancy threats – a claim denied by the government
The action coincides with a yellow Met Office weather warning for a thunderstorm across much of southern England
London Underground staff are not striking today