@Taz78,
Great posting on your part (even though you're not getting the sort of answer you might have hoped for!). We now seem to have a consistent "snapshot" that the eye screening is likely to happen routinely, so don't fret about that for now. And the dietician may not ever appear and if he/she does appear the usefulness of a dietician may not be brilliant (or even slightly useful). So your expectations are being managed!
I particularly agree with
@AndBreathe in the principle of educate yourself. From what I've personally seen and experienced, as well as read in this forum the NHS published advice is not really appropriate for T2s who would usually need to be on lower carb diets - to ease the strain on their insulin production and their metabolism as a whole. And of 4 dieticians I've had the opportunity to encounter, 2 who were hospital based were excellent (and one of those moved on a justifiable promotion), one exchanged an email with me and I've not encountered again and the fourth was well-intentioned (I think) but simply didn't have a clue about my unusual needs and gave poor advice. So I try to find my own answers - often from this forum.
Should you decide to do some Internet searches I would suggest add "uk" to any question; there is an abundance of N American advice and opinions out there, which may not help. I would also be cautious about the origins of some apparently reputable answers; I'm happy to trust Specialist sites such as for Celiacs or Cancer UK (there are others). I believe the Caldesi books are good, written by a well established chef who is himself T2. I'm sure other members will have some great ideas if you should decide to start a further post. Good luck.