Hi, I'm type 1, but I'm trying to keep my carbs low, so let me share my way with it:
I don't know if it's available in UK, but here in Bosnia we have my favorite, almost no-carbs (yet, as full of calories as normal)
stevia-sweetened chocolate. I don't like how stevia tastes, and this is the only product I can eat that contains this false-sugar. It's delicious and almost like real milk chocolate. I also saw some
lactose-free ice cream (thous relatively low-carbs), but it was too hot to carry the whole box from the shop to try it. I bet you can find something similar in shops around you.
Also I recommend any smoothies with berries (fresh or frozen). Based on a bit of low-fat or full-fat yoghourt, you can add something green. Add peanut butter. For sweetness I'm adding half of a banana. My favorite recipe is take some low-fat yoghurt, add half a banana, few almonds, two full spoons of flax seeds, at least one big spoon of peanut butter (i prefer the crunch one) and frozen raspberries. Blend and in the end, since it's the season add some fresh raspberries. In fact any fruits will do. It's my favorite either for a full meal either as a dessert after a light lunch. With frozen fruits, now it's like ice cream almost.
When I was particularly desperate in the winter time I was doing kind of a warm jam from frozen berries and xylitol, just by heating it for few minutes, sometimes making something pudding-like by adding almond flour. You can also use it as a sauce for almond-flour omelet or pancakes. It can be very fulfilling.
Hope it helps! Good luck with finding something you will enjoy as much as the full-carbs treats!