Elizabeth has an invisible impairment, cystic fibrosis, and says, “Even when I’m ill, I don’t look ill and that, I have found, is the problem. I am made to feel a fraud. We are now so awash with adverts asking us to ‘shop’ benefit cheats, and news stories about people laid off work with back problems who are spotted out dancing, that we forget why disability benefits are really there. They’re there to improve people’s quality of life, yet for most of us they remain a last resort, lest we accidentally enjoy life and be labelled benefit cheats.”