At the start of August 2005, Cook and his wife, Gaynor, took a two-week holiday in the Scottish Highlands. At around 2:20 pm on 6 August 2005, while he walked down Ben Stack in Sutherland, Cook suddenly suffered a severe heart attack, collapsed, lost consciousness and fell about down a ridge. He was assisted after his fall by another hill-walker who refused all publicity and was granted anonymity. A helicopter containing paramedics arrived 30 minutes after a 999 call was made. Cook then was flown to Raigmore Hospital, Inverness. Gaynor did not get in the helicopter, and walked down the mountain. Despite efforts made by the medical team to revive Cook in the helicopter, he was already beyond recovery, and at 4:05pm, minutes after arrival at the hospital, was pronounced dead. Two days later, a post mortem examination found that Cook had died of hypertensive heart disease.