A disabled grandfather who campaigned for assisted suicide laws has died at the age of 67.

Grandfather Gordon Ross, who lived in a care home in Glasgow's South Side, was diagnosed with Parkinson's disease in 2005 and was a prominent right-to-die campaigner.

The Humanist Society Scotland (HSS) said Mr Ross was admitted to hospital two weeks ago with pneumonia.

He died as a result of that and his other medical issues just after midnight today.

They said he was surrounded by his family.

Mr Ross supported the resent Assisted Suicide (Scotland) Bill and served as a treasurer of the HSS.

Following the defeat of the Bill on May 27 last year, Mr Ross unsuccessfully tried to launch a Judicial Review calling for the Lord Advocate to bring forward prosecution guidance to provide greater clarity of what charges might be brought an individual who assists someone who is terminally ill and unable to take their own life to commit suicide.

In December 2015 Gordon launched an appeal at the Court of Session to overturn this decision.

Former chairperson of HSS, Leslie Mitchell, who is also a close friend of Mr Ross, said: "Gordon Ross played a crucial role in the development of HSS, considerably more than his role as Treasurer would suggest.

"He helped to grow the society from a small group of like-minded individuals into the large professional campaigning organisation we are today.

"Gordon was an incredibly kind and generous man, always ready to stand-up for the rights of others, and modest about his own significant achievements.

"Gordon was motivated by his desire to promote a rational, ethical and secular Scotland. He remained active and engaged throughout his illness, and played a key role in Scotland's national debate around assisted suicide.

"I was proud to call Gordon a friend, and will miss him immensely."

HSS Chief Executive Gordon MacRae said: “We are deeply saddened to hear the news of Gordon’s death. Our thoughts are with his family and close friends at this difficult time.

“Towards the end of his life, Gordon faced significant challenges with his health, despite this he resolved to play a significant part in the public debate in Scotland around the right-to-die.

“Gordon made a significant contribution to Humanist Society Scotland, and he will be sadly missed by our members.

"HSS will pay tribute to Gordon in the best way that we can; by continuing his fight for both clarity in the current law, and eventual reform of the law to allow people who wish it the right to die with compassion and dignity.”

HSS understands that Mr Ross has opted to donate his brain to Parkinson's disease research. Funeral arrangements will be announced in due course.