The only thing I am aware of (assuming you mean financial benefits) is that you are entitled to “free” prescriptions.
Well managed Type 1 diabetes with a consideration of “reasonable” adjustments (e.g. break times to treat hypos and hospital appointments) as required by the disability discrimination laws, should mean that there is no additional financial implications that require benefits.
If you later develop complications which impact your life significantly, you may be entitled to some financial benefits.