Workers held a demonstration outside the Thera Trust's East Midlands headquarters in Grantham earlier.

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This year, only a minor disturbance is expected: a Wednesday demonstration by phone-company workers over a local grievance.

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Senator Gorst said he would not try to stop the demonstration but hoped he could improve conditions for workers.

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Activists from the women's rights group Feminist Fightback have also joined the demonstration as a majority of the cleaners are women and migrant workers.

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