Rail and Tube workers will stage strikes over the Bank Holiday weekend in separate disputes over pay, jobs and conditions.
RMT members at Heathrow Express will walk out for 24 hours from 3am on Friday, and again from the same time on Bank Holiday Monday. Unite union power control staff on London Underground will also strike for three days from Saturday in a dispute over pay and conditions.
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The rally comes after it emerged that the Home Office destroyed thousands of landing cards documenting the arrival of windrush-era migrants