Ambulance workers are to stage a 24-hour strike in a long-running row over issues including cuts.
Unite said its 450 members in the Yorkshire service, including paramedics and other staff, will walk out on 2 April and ban overtime from 26 March.
The union warned that further strikes could be held.
Unite said the Yorkshire Ambulance Service NHS Trust had derecognised the union after it raised concerns about patient safety over plans to make £46 million of savings over the next five years.
Union members voted by 61% in favour of strikes and 83% for other forms of industrial action.
More top news
Durham City based Anne Harrison, a Church musician and academic, has received an accolade from the Archbishop of Canterbury.
A Newcastle man, who was caught with more than 39,000 illicit cigarettes, has been sentenced at Newcastle Crown Court.
The police has launched an appeal following a burglary in Newcastle. Three men have been charged in connection with the incident.