The Scottish athlete provided one of the moments of the Glasgow 2014 Games in her home pool, when she came third in the SB9 100 metre breaststroke at the age of just 13.

She became the youngest-ever Commonwealth Games medallist but medical experts ruled her out of competing in the British Para Swimming International Meet in Glasgow in April.

The event formed a key part of the qualification process for British swimmers for Rio 2016, and a second panel at this week's Berlin Open has upheld the decision.

It means Davies, now 15, is not eligible to compete for Britain in Rio in September.

Davies, from Sheltand, has Perthes disease, which affects joints and bones, and she has difficulty walking as a result.

The Scotsman has reported that Davies' family are “extremely upset and disappointed” following the decision.

"In line with International Paralympic Committee classification process, Erraid Davies, of Delting Dolphins in Shetland, undertook a second classification review at the IDM 2016 Meet in Berlin, and has been deemed ineligible to compete in Para-swimming," a Scottish Swimming statement said.

"This follows an initial classification review at Tollcross International Swimming Centre in Glasgow back in April.

“Erraid and her family are grateful to the support of the Para-swimming community at this time but have asked not to be contacted direct in order they can digest the information."

In April, Erraid's father David said the situation was a "distressing" for his daughter.

“In one way we are very happy [that she has been classified as able-bodied], but we know the pain that Erraid suffers quite regularly and she has difficulty walking any long distance,” he told the Shetland News.