@nosher8355 You mention biscuits - I like to carry a Granola bar with me when I'm out, it's my security blanket
The toasted (cooked) oats that go into it work best for me, and they're held together with a shot of Maple Syrup. So there's a dual action process that's a good patch for an hour until I can get proper food. If I don't have any of those then an Apple is good for half an hour. These are only quick fix measures, like you say to avoid creating spikes again. I tried glucose tablets once and they didn't have the staying power and only rebounded me.
@CatLadyNZ thanks for the links. The PDF seems long but half of it is credits and references, so its not too bad.
Does anyone have problems with being hungry? During the day it's fine I can shovel the food in and keep on track with daily calorie goals. But I wake up in the early hours of the morning, sometimes stomach grinding away, can't get back to sleep until I've had something to eat. I've recently modified my diet to be less carbs than before. I used to have a small bowl of cereal an hour before bedtime, and if I did wake up early in the morning hungry I'd have a small top up. But I've now cut out grains whilst I try and loose weight and the early morning wake-up call is back.