The Queen went on a tour of the poppy production facility in Richmond, Surrey, ahead of Remembrance Day.
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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.
The club says the decision to sack Ken Hare was "a disappointment". He had been at Roots Hall for 27 years.