My greatest regret from the final weeks of my father's life doesn't involve that cliche of making sure you've said what you want to say. That's a given. I can live with that.

Colin Campbell was otherwise fit and healthy when he suddenly developed agonising abdominal pain. It was appendicitis and he had to be rushed to hospital.

My greatest regret from the final weeks of my father's life doesn't involve that cliche of making sure you've said what you want to say. That's a given. I can live with that.

It's an agonising and disfiguring skin condition that plagues one in every 100 Britons - yet very few have ever heard of hidradenitis suppurativa (HS).