I was in 1st Battalion royal Welsh, an infantry regiment , I left in 2012 after 4 years, and in 2020 tried to re join , passed the selection and medical at the time in February , I got me re joinndate but then the 28th March was diagnosed type 1 , to which my application was refused , I do however know someone still serving with type 1 , but they tend to remove you from all tours of duty and field exercises and put you into an admin role behind a desk, but bottom line is , no you cannot join any of the armed forces with diabetes as you are deemed to high risk to be a soldier due to the conditions you have to operate in