Hi hollieo4, In my experience if I get a lot of hypos then the weight piles on - caused by eating all the carbo to counteract the hypos. Getting the hypos is generally unexpected exercise, which for me makes a huge difference, but once the glargine has been injected then it can't be reversed of course. I also find that Novorapid (and other fast acting) are not fast, typically taking one to two hours to really kick in, which can also lead to unexpected hypos.
On a broader view, when my brother was diagnosed with child-onset diabetes in the early 1960's the dietary advice was essentially a low carb regime. As the years passed this changed to "eat carb, just have more insulin to compensate" which has fairly recently been dropped. I find a low carb diet to be the best to keep control of BGs, especially because the amount of injected insulin is so much lower. I'm not familiar with the WW's diet, is it low calorie but relatively high carb?