What a shame for you. Good job you've got great info on here and on the web to answer any questions. I personally would not trust an NHS dietician to be up to speed with the low carb options as their trade body has only just updated its position statement on low carb for type 2s to say it is safe and effective.
You may be better off getting test strops and trying out which foods cause your blood sugar to rise the most. Some people love low carb, others go vegan/vegetarian but most try and steer clear of highly processed sugary/startchy foods!