Michael, 90, and Bridget Locke, 88, have raised just under £1m for charity over the last forty years.
Kat Cordiner and three friends attempt 3,000-mile (4,800km) crossing to raise money for charity.
Mother at bedside as son lies in a coma in Italy following a car crash.
By Sammy Jenkins
Reporter, BBC West
Gary Herbert describes running about 40 miles a week for a year as 'emotionally exhausting'.