I was put on insulin while in hospital for something else, no discussion, not even told it was insulin and that I was diabetic (though easy enough to work it out). I came off it onto Metformin as soon as I was out of hospital (GP wasn't happy but allowed it just to prove to me how wrong I was - which I do understand him thinking) and was off the Met. within a few weeks, and purely diet-controlled ever after. Apologies for posting on an insulin-users thread, but it just might be useful for others in a similarly bizarre situation, because I can't possibly be the only one, that it is possible in some circumstances to change if definitely T2 (I wasn't even told I was T2).