Hi Natasha,
Sorry to hear about your Mum, but you'll help her a great deal by checking out the great advice on offer in this forum.
She isn't the first diabetic to be misguided by a well intentioned but misinformed dietician.
In my view, it's pointless and actually harmful to switch to low fat alternatives to 'normal' foods. It's not the fat that causes or worsens diabetes - it's the carbohydrates. The bacon and sausages will have a much smaller impact on her blood sugar levels than the chips for example.
If she was to eat more meat, fish, eggs, cheese, nuts and vegeatables and cut out the potatoes, bread, pasta and rice she'll do an awful lot better than on the 'official' diet, and she'll enjoy it a lot more too!
All the best,
fergusc