A second union representing Scottish ambulance workers has warned it could take industrial action in a row over pay and conditions.

A ballot of more than 900 Unison members showed 90% supported industrial action short of striking.

It comes just two days after a similar vote by the Transport and General Workers' Union.

Both unions said they intended to enforce an overtime ban unless talks with management were forthcoming.

About 900 staff are members of Unison

Members, who include paramedics and control staff, are demanding a 5% pay rise and changes to working conditions.

According to Unison, the terms include early retirement at 55, an increase in on-call payments, a reduction in the working week, unsocial hours payments and enhanced payments for overtime, weekend and shift working.

So far the Scottish Ambulance Service has offered 3.6% and a reduced working week.

David Forbes, Unison's regional officer for ambulance staff, said: "This overwhelming response shows clearly the depth of feeling of our members.

Improved offer

"Whilst the basic pay rate is important, our members are fed up working overtime, weekends and shifts for no enhancement.

"I will be taking this result to the employers and will be urging the ambulance service to come back to the trade unions with a considerably improved offer."

More than three-quarters of T&G members voted in support of taking action short of strike action.

Neither union has defined a timescale for action following the consultation ballots.

A spokesman for the Scottish Ambulance Service said: "We have for some time been in constructive discussions with the unions and we hope to continue these to resolve the situation."