'I can't see where I'm going, I've got an artificial hip and a plate in my ankle - but I'm walking 50 miles for charity'

And as Alan, who is registered as partially-sighted, begins his 50-mile walk, five-day challenge, he will have no problem finding the inner strength to motivate himself. He is raising money for two charities close to his heart in memory of his beloved wife Mary, who died in his arms last year.