Trade unions have formally backed the Scottish Government's plan to give NHS workers a 9% pay rise over the next three years.

Nurses, midwives, paramedics and allied health professionals will be offered a minimum 9% pay increase over the period, benefiting around 147,000 staff.

The Scottish Government says it is the most generous pay uplift for health workers anywhere in the UK.

Employees earning under £80,000 will receive at least a 9% rise over the three years while anyone earning more will get a flat rate increase of £1600 per year.

Despite welcoming the deal, Scotland's biggest health union Unison has urged the Scottish Government to break with the UK's pay review body, branding it "dead in the water".

Thomas Waterson, chairman of the Unison health committee, said: "I am pleased to announce that 94% of Unison members have voted to accept a pay deal which will put an additional £400m into NHS workers pay packets in Scotland.

"This deal delivers real increases of between 3% and 27% for NHS workers in Scotland.

"The strong endorsement by Unison members makes it clear that we do not need to wait cap in hand for the pay review body.

"This institution as it stands is dead in the water."

He continued: "Eighteen months ago some people said that we couldn't negotiate a separate pay deal for NHS workers in Scotland. Then they said that we couldn't negotiate a better deal for Scotland.

"The Scottish Government should commit now to develop negotiating structures in Scotland and allow us to self determine on pay."

The union consulted nearly 60,000 Scottish NHS workers over a four-week ballot, while 71% of Unite members working in the health service also voted to accept the pay offer.

Unite regional officer James O'Connell commented: "This was a complex pay deal which will deliver a well-deserved pay increase for our members.

"While we recognise the value of the offer to our members following years of austerity and pay restraint, we are not complacent.

"It is the start of a process of trying to make up for the years our members have struggled within a rigid pay policy.

"It is not right that they have had to wait several years to have their contribution properly recognised.

"Going forward we need to consider how we negotiate pay that will put money back in our members pockets faster and whether the pay review body is the right mechanism to do that."

Members of the Royal College of Midwives in Scotland (RCM) joined the others in accepting the proposals, with 95% voting in favour.

The union's lead negotiator Emma Currer said: "The RCM is pleased that our members have accepted this pay offer.

"It means that midwives, maternity support workers and other hardworking NHS staff in Scotland can finally begin to recoup the losses they incurred after years of pay freezes, pay stagnation and uplifts well below inflation.

"This is something the RCM and other unions have been fighting for.

"This is a good deal and one that we believe is the best that can be achieved in the current economic climate."

Welcoming the agreement, Scottish health secretary Jeane Freeman said: "Scotland's NHS is founded on the hard work and dedication of its staff. This agreement is a recognition of that hard work.

"I'm delighted that NHS staff have voted to accept our offer of a pay rise of at least 9% over the next three years.

"This rise - which is linked to a commitment to reform some terms and conditions - will be up to 27% for some staff. That is the highest health uplift in the UK.

"This pay rise can help recruitment and retention and ensure that our NHS remains an attractive employment option for many."