KWOKLYN WAN, 48, 20st 9lb HEIGHT: 5ft 10in WAIST: 50in BMI: 41.3, obese

author and chef Kwoklyn lives in Leicester. he says: I’VE been active throughout my life, practising martial arts. However, I have always been big, and recently my weight caught up with me.

Last July I was told I needed a hip replacement, but because of my high BMI I’m unable to have it until I lose five stone.

I’ve lost three-and-a-half stone and I’m determined to reach my goal. I also have type 2 diabetes, and measuring the circumference of my tummy is a good way to keep track of my lifestyle choices, too.