Many years ago you would automatically be sent to the diabetic clinic at the hospital whether you were T1 or T2, but with the increase of diabetes and little increase in the time/HP to run clinics it was decided that the GP could manage T2's as it involved tablets and diet and refer patients to the consultant when they were having problems that the GP couldn't solve...
But there was still the hospital clinics were being bogged down with patients, so a rethink was made that if T1's were well controlled then they GP surgery could over see the on going monitoring, reffering patients as necessay to consultant where felt necessay...
How well this works for the patient, really depends on the competence of the GP and nurses within any GP surgery, I'm lucky that within my surgery the DSN as direct access to the diabetic team at the hospital, which includes regular training sessions, and question and answer sessions with the consultants etc... Very well set up indeed.. And our doctors listiens to what how DSN says!
Because of my problems I was having I was reffered to the consultant and because of my insulin pump my care is overseen by the hospital, but I still have access and see my DSN at the surgery, but my husband has his whole diabetic care overseen by our surgery as he's has good control and happy to remain within the surgery care..
AS with any system of care, there will be good bits and bad bits, along side good HP proffesionsal and helath proffesionals that you wonder what planet they trained on!!!!!