Did rugby damage these players' brains?

John Beattie played for Scotland and the British and Irish Lions.

In 2015, he made a documentary about the growing evidence that repeated head injury in contact sports might lead to long-term brain damage.

Now he has been contacted by former players who are worried that this may have happened to them.

In this exclusive film, John hears their stories and speaks to the man who was the Scotland rugby team doctor for 30 years.