Waitrose have on offer 99% Lindt Dark chocolate only 8 gm of carbs per 100gm I could not eat more than a couple of squares and I found not too palatable but got quite a "happiness hit" from the chocolate content . If I am honest I prefer Tesco 85% ( which needs will power to restrict to 2 squares and is 22gms per 100gm) . Also my local Tesco express have a Dark chocolate nut and sea salt bar called Kind ( in the free from area as no gluten or dairy ) Carbs per 40 gm bar 16 but fibre 7 so net carbs 9 . Also I found that I only wanted to eat half a bar as it was so rich and very nice so in my case well worth the 4.5 net carbs as a treat.