Airedale hospital workers have voted to strike in anger at two-tier workforce structure.
Porters, domestics, catering and security staff will walk out over the fact they get worse terms and conditions than colleagues working at the same hospital.
The workers have been outsourced to AGH Solutions (AGHS), a wholly owned subsidiary of Airedale NHS Foundation Trust.
AGHS uses its subsidiary status to not honour the NHS Agenda for Change terms and conditions, including NHS pensions, sick pay rates, annual leave and Sunday working enhancements.
The workers want parity for everyone working across the trust.
More than 90 per cent of those who voted said they were ready to take industrial action which is scheduled for 12, 15 and 16 of September - with more dates set to follow.
Joe Wheatley, GMB Organiser, said:
"These workers are absolutely vital for Airedale Hospital to operate safely.
"It's outrageous that they are treated like second class citizens.
"These workers will walk out with heavy hearts - Airedale and AGHS must now recognise how important they are and give them the same pay, terms and conditions as the rest of the workforce."

Council to review parking charges across North Yorkshire
Towns and villages across North Yorkshire to take part in the official Yorkshire Day celebration in 2029
Children's charity praise Skipton nursery and building society for support with bake sale
Nursery to raise money for childcare with annual Easter Egg Hunt
Red Lion Pub to host grand re-opening after refurbishment
Council update on operator of Alpamare water park
Visitor levy would be mayor's decision, says senior councillor
Artisan market to return to Skipton this March
Skipton families able to access free breakfasts for children during school holidays at Morrisons
Skipton MP responds to recent claimant figures
Skipton schools encouraged to join Tesco's grant scheme for access to healthy food
Bus company reminds locals of Haworth routes following 'Wuthering Heights' release
Dacre, Son and Hartley share the love for Random Acts of Kindness Day
Council chiefs deny claims of conspiracy to remove committee chair
Council agrees £150,000 funding to reduce winter deaths
The Craven Heifer Inn officially reopens
Half term events: Skipton Library
Silsden green grocers nominated for New Business Award
1,000 Smiles: Pateley Bridge woman wins £1,000 prize
Tribute night in Skipton to raise money for Skipton Pride


