Barry, 70, says he was a “textbook case for type 2 diabetes” because he drank, smoked and had a sweet tooth.

He says when his doctor told him the consequences of smoking, he quit straight away because you have to “grab the bull by the horns”,

When his consultant advised him on trying different methods, it opened up new ways for him to manage his diabetes.

Barry has had type 2 diabetes for 30 years.