The brother of a man living with Motor Neurone Disease is tackling a triathlon that will see him run, cycle and swim from Loch Ness to London.
Adrian Murphy is taking on the challenge to support his brother, Brian, and others living with the disease.
The 40-year-old starts with a 5km swim across Loch Ness on Sunday, before cycling 620 miles to London.
The challenge will come to a close with a 50km run along the River Thames.
Mr Murphy, the chairman of MND Scotland, said he had been using his brother as motivation throughout eight months of gruelling training.
