A student who died in a crash on a private estate was the son of MI6 chief Alex Younger.

Sam Younger, 22, was described as a "wonderful son" by his devastated family after he was killed in the incident in Stirlingshire at the weekend.

Mr Younger's father has been chief of the Secret Intelligence Service (SIS) - a position known as "M" - since November 2014.

The Edinburgh University student was remembered as "always warm and friendly" and "confident and excited about the future" by lecturer Kieran Oberman.

"We are devastated by the tragic news of his death and our thoughts are with his family and friends," he said.

Mr Younger was a former pupil of the prestigious Dulwich College boys school in south London, where he played rugby in the first XV.

The Old Alleynians Association of former students announced his death with "deep sadness".

"Sam died in a car accident in Scotland in the early hours of Saturday morning," said a statement online.

"A selfless, big-hearted, fun-loving and committed Alleynian, and Old Alleynian, we offer heartfelt condolences to Sam's family and friends."

Police Scotland said Mr Younger's death was being treated as unexplained, although there did not appear to be any suspicious circumstances.

The force said: "(We) can confirm that Sam Younger, a 22-year-old student from Edinburgh University, has died following an accident involving a motor vehicle on a private estate in Stirlingshire on Saturday, March 30.

"The family have provided that they wish privacy and space to remember and celebrate their wonderful son."

A report was being compiled to be submitted to the procurator fiscal.