Chris Walton obituary

My friend and colleague Chris Walton, who has died aged 69 of brain cancer, was a biologist and lecturer at Cranfield University, Bedfordshire. He had a passion for getting things to work in the real world; consequently he was widely regarded by his colleagues as an honorary engineer. Chris studied volatile organic compounds (VOCs) in matrices including breath, sweat, blood, urine and faeces, finding links between specific VOCs and different human diseases, and developing new ways to measure the