My understanding from the current statements by the government is that the UK has given up on containment so will be concentrating on delaying the virus so as to "squash the curve" so that the health system can cope (and hopefully move the peak to the summer when the NHS is least stretched.
For the virus to end naturally we need 50% to 80% of the population to get it.
Young people (under 20 very much so and under 30 mostly) are very very low risk, and if diabetes doubles your risk then you're still very very low risk. You'll probably get the virus and never know. Just don't visit your elderly grandma for a while.
The danger is age and comorbidities (diabetes + … high blood pressure, heart disease etc etc).
I am so glad that this virus is safer the younger you are, even though that means I personally am pretty vulnerable.
I currently live in NZ and there is a small chance that our current outbreak (5 + 2 possible) is contained, but even if this is in the long term it'll come back. But it would be good to delay the peak till our next summer (9 months) or (wild hope) a vaccine is available.
Stay safe and keep washing your hands, everyone. Social distancing will squash the curve, but no one realistically expects under 20s to do too much of this.... (and long term we want you to get it so that we can get the numbers up to make the vulnerable safe.)