Hard as it is, sometimes Mum just isn't the best person to talk to a teen. I'd arrange her to either speak to someone she respects or get the diabetic nurse or a doctor to intervene. This needs to be handled gently as sometimes teens use their insulin needs to lose weight. She needs to be empowered to take responsibly for her health but also reminded of the risks. Nagging just won't work for some teens. I'd go for one discussion and education and leave it there. Sorry, difficult one, hope you find something that helps.
Gary Glitter programme Tuesday
To think that London, or anywhere else for that matter, does not belong to any one demographic