Hi Michelle,
If I could just take you up on a couple of your points (no sandbags needed), "Carbohydrates are full of vitamins" - absolutely spot on. For example
Vit A - fruits and vegetables, including carrots, sweet potato, chili peppers, spinach, kale, spring greens, cantaloupe melon, mango, cabbage
Vit B1 - sunflower seeds, fruits, vegetables
Vit B2 - soy beans, broccoli
Vit B3 - grapenuts, peanuts, peanut butter, asparagus, almonds
Vit B5 - alfalfa sprouts, peas, lentils, mushrooms
Vit B6 - lentils, fruits (esp banana and prunes)
Vit C - fruits (like, blackcurrants, citrus fruits, guava, kiwi fruit, oranges, papaya, rosehips, strawberries) and lightly boiled or raw vegetables (like, red chili peppers, bell peppers, broccoli, Brussels sprouts, cauliflower, spring greens)
Vit E - soy beans, almonds, hazelnuts and sunflower seeds, fruits, avocadoes, sun-dried tomatoes, and leafy green vegetables
Vit H - nuts and fruits
Vit K - green tea, dark green leafy vegetables, skins of fruit and vegetables
The point is that nobody has ever suggested that you should not eat these, or eat less of them. They all contain sensible amounts of carbs, but also other beneficial things such as fibre and cis oils. The big problem is that we are constantly told by the "experts" to eat diets high in carbohydrate in the form of bread, pasta, potatoes and rice. All these will do is provide a carbohydrate overload, resulting in unnecessarily high blood sugars.
You also said "Heart disease is this country's biggest killer, and as diabetics we already have an increased risk of developing it. So why take the chance? Why not just cut down a bit on the fat?" Its not just in the UK this applies but also in the US. Sometime around 2005 the American Medical Association (in response to the huge increase in heart disease) commissioned Stanford University to undertake an independent year-long research into the relative merits of low carb/high protein, medium carb & protein and high carb/low protein diets, particularly with regard to the effects on cholesterol. Stanford was chosen because they are renowned for their impartiality - they refuse to accept commercial funding for any research they undertake.
Stanford used Atkins as the low carb diet, Zone as the mid range diet, LEARN the high carb diet, and Ornish as the extremely high carb and almost zero fat diet. The results were made public in 2007 and surprised many by showing that those on the low carb diet (Atkins) initially showed a rise in all lipids (LDL, HDL and Trigs), but by the end of the year they registered the greatest decrease in LDL and blood pressure and the greatest increase in HDL. It is this research that is now starting to change governmental thinking on what should constitute a balanced "heart-protective" diet and has lead the US to announce new guidelines that protein and carbohydrates should be eaten in equal parts. In the US government bodies are at last starting to realise that, when they have been advocating a national diet high in carbs and low in fats and proteins for the last 20 years, and throughout that period heart disease has been rising, perhaps they didn't really understand the mechanics of heart disease after all!!