The latest campaign to encourage people to sign up to the organ donation register is being launched on Tuesday.

Health Secretary Nicola Sturgeon will be at the Royal Infirmary in Edinburgh for the launch, where she will be joined by Professor John Forsythe, Scotland's lead clinician for organ donation and transplantation.

Ms Sturgeon will meet Helen Lang, from Johnstone, Renfrewshire, who had a life-saving liver transplant at the hospital in June this year and who is supporting this year's campaign.

She will also meet Brian and Muriel McCabe, whose son Grant died suddenly aged 40 in September 2010 and went on to donate organs that saved the lives of six people.

Latest figures show that 37% of the population in Scotland put their names forward for the register, equal to 1.8 million people, compared with the UK average of 29%.

At present, the UK operates a system of informed consent for organ donation, which means people who wish to donate signal their intention on the national register and families play a key role.