Suffolk rail commuters are facing five days of strikes on the tubes in London which have been called between next Monday and May 5.
They are part of a series of strikes in three separate disputes over issues including pay, pensions and jobs.
Members of the Rail, Maritime and Transport union will take industrial action against London Underground (LU), Transport for London (TfL) and the Heathrow Express in the coming weeks.
LU workers will walk out for 48 hours from 9pm on April 28 and again for three days from 9pm on May 5 in the long-running row over Tube ticket office closures.
The first two days of action will take place ahead of a May Day event in London in memory of former RMT leader Bob Crow, and Tony Benn, who died within days of each other last month.
RMT members at TfL, who work in admin roles, will strike for 48 hours from 9pm on April 28 in a dispute over pensions.
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