A union has said some staff at a hospital trust have been paid thousands of pounds less than they should have following a pay agreement.
Unison represents healthcare support workers at Colchester and Ipswich Hospitals, run by the East Suffolk and North Essex NHS Foundation Trust.
The union and trust had agreed to introduce a new, national pay-band structure for healthcare assistants, but the union said some had still not received their full wage.
The trust's chief executive Nick Hulme said some staff were receiving more than £4,000 in back pay and talks were ongoing with the union.