Last week's action by Unison members at hospitals in Wakefield, Dewsbury and Pontefract followed a ballot in October which saw 88% of those administrative and clerical staff balloted voting in favour of strike action.

BBC: Unison strikers

Unison said administrative and clerical staff last month voted 88% in favour of the one-day strike action.

BBC: Female hospital workers holding placards in protest

Administrative and clerical staff, as well as medical secretaries and senior nurses and matrons, are facing compulsory redundancy, the trust confirmed.

BBC: Pontefract Hospital

Administrative and clerical staff, including medical secretaries and receptionists, were balloted by the union, which said 88% voted in favour of strike action and 96% voted in favour of action short of a strike.

BBC: Mid Yorkshire Hospitals NHS staff vote to go on strike