Grandmother Sue Callear who weighed 35st sheds 20 STONE

Sue's diet of junk food and snacking saw her eating 4,000 a day Was so large she had to make her own clothes using metres of material Decided to tackle her size after hearing a nurse make a hurtful comment Borrowed money from her father for gastric sleeve operation Dropped from 35st and a BMI of 79 to 15st and a size 18 Gone from taking 20 tablets a day for numerous illnesses to just vitamins Now able to get first job in 6 years and play with her grandchildren

Published: 05:43 EST, 4 August 2014 | Updated: 06:51 EST, 4 August 2014

A grandmother who used to eat 4,000 calories a day and weighed twice as much as a baby elephant shed more than 20st after she overheard a nurse say to a colleague: 'If I ever get that fat, shoot me'.

Sue Callear tipped the scales at a 35st at her heaviest and was classed as super-morbidly obese - meaning she could have died at any time.

The 50-year-olds body mass index (BMI) was a staggering 79 - almost four-and-a-half times the recommended 18.5 for a healthy adult.

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Sue Callear, pictured in 2010, with her grandson Jack, shortly after his birth, weighed 35st at her heaviest

Sue has dropped an incredible 20st from 35st (left) to 15st (right) after having a gastric sleeve fitted

She even had to make her own clothes using two-and-a-half metres of material.

Sue also broke several beds and had to use special heavy-duty handrails to drag herself upstairs at her home in Stoke-on-Trent, Staffs.

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Grandmother Sue Callear who weighed 35st sheds 20 STONE