Hello. My partner is a Type 1 diabetic (and my Mum has Type 2), and as I enjoy cooking I've done some of the legwork on this! A lot of the 'diabetic cookbooks' out there do seem to be American. I got around the American measures by buying a measuring cup with American units on it!
Diabetes UK have a recipe finder on-line at:
http://www.diabetes.org.uk/Recipes.nsf/Searchrecipes.
They also publish a Diabetes Cookbook in association with DK:
http://uk.dk.com/nf/Book/BookDisplay/0,,11_0751308269,00.html that is very good.
It must be noted that honey and fruit sugars are not a
substitute for 'ordinary' sugar, in that they will still have the same effect on a diabetic's blood glucose. Sometimes they can actually raise blood glucose faster than sugar, as they are absorbed quicker.
Smaller slices of cake, that's the answer! (Yes, I know how that
so doesn't work when faced with an entire chocolate cake ;D)
The sweetener called 'Splenda' purports to be made from sugar, rather than an artificial chemical. We use it, and they have recipes too:
http://www.splenda.co.uk/