Hi Jezzer,
Welcome to the club! I hope you're soon back on your feet and feeling good again soon.
What to eat and not to eat, well, quite simply a healthy, balanced diet. Limit fats and salts, moderate carbohydrate intake. Cut out the fast and ready foods, good sensible home cooking. Omit the sauces and mayonaisse etc on sandwiches.
Essentially, you need to eat breakfast, lunch and dinner. You can't miss meals of vary the times you take them by too much.
There are some good cook books for diabetics and some awful ones, my favourite as it has a good cross section of recipes for everyday living is 'The everyday diabtic cookbook' by Stella Bowling it is published with Diabetes UK, who are a superb organisation and I'd strongly suggest for the twenty something pounds a year you join, you used to get an introduction to type one or two diabetes and the bi-monthly magazine Balance.
www.diabetes.org.uk
One of my favourite recipes in this book is lamb and lentil hotpot - I tend to add a bag of scotch broth mix (lentils, pulses and beans) and make a big stock pot, it freezes very well, only you need a big freezer for the stock pot!
I'd suggest you steer clear of the Worzell-thomsons book (the ginger TV chef) its too fancy for everyday cooking.
Avoid expensive 'diabetic' sugars and foods, the sugar content is often only a tad less than normal food and the price twice that of a jar of normal jam - just use a fraction of the amount - you still get the taste.
It's all about being sensible and balancing what you eat, well I think so, sure I might get told off by some for my advice.
Good luck with your appointment, seeing a dietician can often be beneficial, there is a waiting list for these people, but the information they have about diet is far more extensive than specialist nurses (in my opinion).