Ticket checks onboard ScotRail trains will return from Monday as coronavirus restrictions are eased.
The operator's staff will step up visiblity across its services – having axed the roles last year to prevent the spread of the virus.
Phil Campbell, ScotRail head of customer operations, said: "We are absolutely committed to the health and wellbeing of our staff and passengers, so there has been a massive effort to ensure the on-train environment is safe to give people peace of mind when travelling.
"But, it's also vital our passengers remember they have a responsibility to each other, and our staff, to observe our rules for safer travel until COVID-19 restrictions are completely lifted.
"Customers are being reminded to buy tickets in advance of travel via the ScotRail app, website, or station facilities.
"It is a requirement to hold a valid ticket before boarding a train, and we will be increasing the frequency of our checks to make sure customers are playing their part."
ScotRail will also be increasing its number of services from Sunday, May 16.
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