This petition was rejected

The Government e-Petitions Team gave the following reason:

Personal Independence Payment (PIP) can help with extra living costs if someone has both:

- a long-term physical or mental health condition or disability
- difficulty doing certain everyday tasks or getting around because of your condition

Eligibility for PIP is based on the difficulties a person has doing certain everyday tasks, not the condition a person has.

Similarly, the Government's guidance on disability under the Equality Act 2010 states that you’re disabled if you have a physical or mental impairment that has a ‘substantial’ and ‘long-term’ negative effect on your ability to do normal daily activities:
www.gov.uk/definition-of-disability-under-equality-act-2010

It is therefore already the case that under the Equality Act, anyone with a physical or a mental condition which has a substantial and long-term impact on your ability to do normal day to day activities is protected under the disability protected characteristic. This could cover people who have diabetes, where this has a a ‘substantial’ and ‘long-term’ negative effect on their ability to do normal daily activities.