Rail union RMT has announced that guards on London Overground will strike on the following days:
Sunday 25th August
Monday 26th August
The strike is over a move by the company to introduce Driver Only trains (without guards) on the whole of the London Overground network.
More top news
Firearms officer Martin Finney was awarded the George Medal, Britain's second highest civilian decoration.
Members of the RMT union who work on the Central Line will walk out at 9pm on Wednesday.
Southeastern was hit after a freight train derailed causing travel chaos for hundreds of thousands of passengers.