The GMB trade union, a leading health union in the UK, accepted the government's improved pay offer for National Health Service (NHS) staff on Friday, while some other unions rejected it.

The offer, agreed between the government and healthcare union leaders last month, included a one-off payment equivalent to 2% of salaries in the 2022/23 financial year and a 5% pay rise for 2023/24.

GMB's backing means the offer has been accepted by four unions representing NHS workers whose members include midwives, physiotherapists and ambulance workers.

The long-running dispute has led to hundreds of thousands of NHS staff taking strike action over the last few months, adding to strains on the health service.

Other public sector workers in Britain, including teachers as well as train staff, have staged strikes in recent months as they demand higher pay deals in the face of an inflation rate that remains above 10%. The government of Prime Minister Rishi Sunak has said big pay deals could fuel future inflation.

The NHS Staff Council, which includes representatives from NHS employers and trade unions, is due to meet on May 2 to vote on whether to accept the offer.

The GMB's leadership said it would now vote in favor of the pay offer, after 56% of its members who voted in a ballot accepted the deal. 

"This new pay offer would not have happened without the strike action taken by ambulance and other GMB health workers," said Rachel Harrison, GMB national secretary.

Britain's Health Minister Steve Barclay said Friday's announcement showed the government's offer was "fair and reasonable" and could end the dispute.

"I've always said I want a fair resolution that recognizes the outstanding job of NHS staff and also protects the government's commitment to halve inflation, and I'm hopeful the NHS Staff Council accepts our offer when they meet next week," Barclay said.

Earlier, the Unite trade union said it planned fresh strike action after 52% of its members who took part in the ballot voted against the offer.

"Unite was clear from the start it was very unlikely this offer would be accepted," Unite general secretary Sharon Graham said in a statement. "Unite's members will now return to the picket line to continue their fight."

The nurses' union, the Royal College of Nursing, also rejected the offer earlier this month and is planning a further strike.

(With input from Reuters)

(Cover: Junior doctors stand in a picket line outside the Royal Cornwall Hospital, holding placards stating "pay restoration for doctors" during a demonstration in Truro, Cornwall, UK, April 13, 2023. /CFP)