Martin felt unhappy after seeing his holiday snaps. He was overweight and felt he looked unhealthy.

He went back to his doctor, who put him in touch with dieticians at Charing Cross Hospital. They recommended he use a free app called “My Fitness Pal”.

Soon he was competing with the app, cutting out bread and beer, and quickly dropped to 108 kilos, from 136 kilos. He reckons if he can do it anybody can.

Martin was diagnosed with type 2 diabetes in 2011 during a routine blood pressure check.