Now that is crazy! Maybe the sugar is to stop the bran being too bland maybe? Then again isn't that the point?! The mind boggles..
Yeah shes managing ok with the diabetes and has now found a range of jams etc she can safely have and still enjoy it. I think shes just watching her calorie intake now and it seems to be working ok for her.
I'm glad that your mum is coping better!

my mum has diabetes too and I know how frustrating it can be, I risked of getting it myself as I was insulin/resistent when I was younger.
Have a look at the info:
Bran Flakes (100g)
Energy
- kJ 1503
- kcal 356
Protein (g) 10
Carbohydrates (g) 67
- sugars (g) 22
- starch (g) 45
Fat (g) 2
- saturates (g) 0.5
Fibre (g) 15
Sodium (g) 0.4
Ready Brek Chocolate 100g:
Energy (Kilojoules) 1603kJ
Energy (Calories) 380kcal
Protein 10.0g
Carbohydrate 63.6g
(of which sugars) 21.0g
Fat 8.0g
(of which saturates) 2.2g
Fibre 7.0g
Sodium trace 0.01g
However, the ORIGINAL all bran is slightly lower in sugars:
Energy
- kJ 1400
- kcal 334
Protein (g) 14
Carbohydrates (g) 48
- sugars (g) 18
- starch (g) 30
Fat (g) 3.5
- saturates (g) 0.7
Fibre (g) 27
Sodium (g) 0.45
but I don't feel it's an awful amount lower... if you compare it with the ORIGINAL ready break porridge, you see a massive difference:
Ready Brek original, 100g
Energy (Kilojoules) 1568kJ
Energy (Calories) 373kcal
Protein 11.7g
Carbohydrate 57.9g
(of which sugars) 1.0g
Fat 8.7g
(of which saturates) 1.2g
Fibre 7.9g
Sodium <0.1g
So althought the FIBRE intake is MUCH MUCH higher in the all-bran or bran flakes, they seem to compensate the lower fat with higher sugar, which is not good, as the saturated fat in ready brek is only slightly higher (1.2 sat fat for original and a little bit higher, 2.2, for chocolate) than the bran's (0.7 and 0.5), so that means that they're compensating the absence of possibly GOOD fat for taste with sugar which is bad for you, thanks very much! The calorie intake is also very similar, including the ready brek chocolate!