A UNION has voted for fresh strike action at ScotRail in a dispute over numbers of CCTV-monitoring staff.

The TSSA has accused the train operator of a "criminally negligent" shortage of the specialist role which it says is jeopardising security on the network. Scotrail said the changes would improve safety on the railways.

The union said there had been "bad management" of a company-wide voluntary severance programme after it accepted applications from 17 of 22 specialist staff.

TSSA general secretary Manuel Cortes said: "ScotRail bosses are keen to cut salary costs but as they do so they show they know the price of everything and the value of nothing.

"They are purposely undermining the safety critical aspect of their own CCTV operation as they implement their misguided and dangerous cuts agenda."

He said a previous vote for strike action last year was not progressed after concessions were won.

"So it's now frankly criminally negligent of ScotRail to have authorised the severance of specialist staff which has left our remaining members working flat-out on over-stretched rosters as they try to bridge the yawning gap in the resources needed to run the network safely," he said.

"Let's hope ScotRail now see sense. If they don't, a strike is inevitable. It will be a show of determination by our members, doing whatever is necessary, to ensure our railways are run in the interests of passenger safety, not Abellio's profit margins."

ScotRail sustainability and safety assurance director David Lister said the company was "disappointed" by the vote but will continue discussions.

He added: "The vast majority of our employees are very positive about the investment we are making.

"The safety of our employees and customers is our priority, which is why our proposals will improve safety and enhance the information we provide to our customers. It is wrong and misleading to suggest otherwise."

ScotRail said its policy of no compulsory redundancies remained in place.