accredited

A Scottish government spokesperson said OLRs were only used following a risk assessment carried out by accredited experts.

The group had tested 20 sunscreens in an independent accredited Australian lab, finding 16 did not meet the SPF, or skin protection factor, rating listed on the packet.

Some 1,115 prisoners did start accredited treatment in prison and 1,094 people completed those courses.

David McFarlane, a marine safety consultant and accredited expert witness, said all vessels, regardless of whether or not they were moving, had "an obligation to keep a proper look-out".

"There are still programmes out there that are not accredited. I tell people all the time, stay away from them," he says.