Mandatory vaccination rules for a North Sea energy firm's workers have been described as "draconian" by a union.
Canadian Natural Resources (CNR), which has a base in Aberdeen, will only allow staff and contractors vaccinated against Covid to be offshore.
CNR said worker safety was key, but the Unite union criticised the move which has now come into force.
The Scottish government said employers needed to consider their own specific circumstances.
The change could impact up to 20% of the workforce, with the remainder vaccinated, according to Unite.
CNR operates platforms in the Ninian field, off Shetland.
In a statement it said it had implemented "extensive measures" to reduce the risk of exposure and transmission of Covid-19 in its operations, including a vaccination policy.
"Our decisions are made with the health and safety of all company staff and individuals working with CNR International in mind," the company said.
"We have been liaising closely with contracting companies to encourage their offshore employees not yet vaccinated to join the majority of the offshore crew who are.
"This includes providing access to medical professionals, help in addressing any concerns or logistical barriers to vaccination, and granting exceptions, where appropriate. To date, the response to this approach has been positive, with a significant majority of our offshore workforce now vaccinated."
Unite said it was not aware of other offshore contractors and operators...
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