Thanks for the welcome Rachox
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I realise that I forgot to say that I don't like Coke or any of it's relatives, and sugar free "sweet drinks" such as 7up are not to my taste at all. Some sugar free lemonades are OK.
I already drink black tea and coffee, but am seeking to replace beer/wine. The drink doesn't need to taste like the alcohlic drinks, but I guess I'm looking for drinks with some complexity. One thing we have found this Christmas is Ribena "Winter Spice", a limited edition low sugar drink that is 1.8g carb for a 250ml serving.