Thanks for your kind and supportive comments!
I feel very lucky to have caught this disease so early, while still pre-diabetic.
Over a year later, my A1c, fasting and postprandial readings are now normal - as was an OGTT.
So, weightloss, exercise and a low carb lifestyle, with a very low dose of Met (also some supplements, of unknown benefit), *can* reverse prediabetes back to normal levels, as some of the studies say. Maybe it is only temporary (in which case, I've had a 'free' year of normality), maybe it only delays the inevitable (likewise).
Since my numbers continue to improve (though now quite slowly and in small amounts) I feel my chances are reasonably good that I've won myself a decent period of reprieve, at the least.
Essentially, I suppose I am now a latent pre-diabetic, in that if I were foolish enough to go back to my old ways, my numbers would start to go haywire again - I've been fortunate the first time, I have no intention of trying my luck a second time...
Reading on various forums, it seems that GPs, in general, will not acknowledge that patients can achieve - or maintain - substantial weightloss, so don't seem to advise their overweight (pre-)diabetic patients of the potential benefits, instead just doling out the pills and advising a high carb diet...
I was a real slob, so if I can do it, anyone can!
Now that my run of x-ray appointments are gone (all clear, too!) I'm free to restart the Met, though my GP has left the decision to me - not wanting to mess with a winning comnination, I've restarted today.
No stomach rumbling so far....
Mark