I would love to say that I am seen every 12 months. However, my local healthcare team tell me they do not have enough diabetes consultants to see their patients as often as needed. Therefore, it is usually every 13 to 14 months. However, when I bought this up at my last "annual" review, I was told they will see quicker if I chase them. For example, if your driving license is due to be renewed.
Not great but at least they are honest about how to get around the system.