Spartan Pudge, 28, aka Sebastian, has grown from 15st 10lb to 27st 12lb today - and he now wears XXXXL clothes

For most people, a 'treat day' is when they let themselves enjoy whatever they want to eat and are generally more relaxed with their diet.

But for 28-year-old Spartan Pudge, aka Sebastian, it's the day when he cuts his calorie intake down to just 2,500.