TRAIN services are being impacted as ScotRail staff test positive for Covid-19 and self-isolate as the Omicron variant spreads.

ScotRail said there had been a sharp rise in the number of colleagues who have either tested positive or are self-isolating as a precaution.

Nicola Sturgeon mentioned at the Covid briefing on Friday that there had been 60 ScotRail cancellations due to staff shortages.

They said that there were 38 staff self-isolating last week and that has risen to 50 this week.

Travellers are being advised to check journeys before arriving at stations as services are mainly being affected across the central belt.

David Ross, ScotRail communications director, said: "We’re sorry to our customers who are being inconvenienced as a result of an increase in the number of our staff self-isolating due to Covid.

“We are working flat out to run a safe and reliable railway in difficult circumstances.”

The TSSA union said the reintroduction of the 10-day self-isolation period showed a need for the return of the furlough scheme.

READ MORE: Omicron could cause 'tsunami of infections' Nicola Sturgeon has warned

General secretary Manuel Cortes said: “Sturgeon’s intervention today reinstating 10-day isolation on contact with the virus was welcome.

“But we are one island and to fight off the Omicron variant we need Britain-wide action.

“That’s why Boris Johnson needs to immediately reinstate the furlough scheme so businesses can send non-essential staff home without loss of income.”

During the First Minister's Covid briefing, Nicola Sturgeon mentioned that the uptick in cases and people isolating has already had an impact with dozens of train services already cancelled.

She said: "The numbers of people becoming infected even mildly and having to isolate will put a significant strain on the economy and on critical services.

"We’re actually starting to see this already. I can tell you that today there are 60 ScotRail cancellations due to staff shortages, and these staff shortages are mainly due to Covid."

Watch the full Covid briefing below