Norman Gordon was colour blind.
Norman didn't know that he had rectal bleeding until it was too late and he died at 53 of bowel cancer.
His wife Brigette says:
''Norman was very colour blind. he used to wear odd combinations of colours. One day he asked me to look in the toilet to see is there was anything wrong and I was shocked to see blood, a lot of it. He couldn't see it and he had had the symptom for some time.''
Colourblindness tends to run in families. So does bowel cancer. Norman's father was diagnosed two years before Norman, his uncle 18 months after Norman died.
If your family is affected by colourblindness and bowel cancer, ask your GP about screening and genetic advice in your area