Low Sugar Drinks (UK)

Apart from water, tea, coffee and herbal teas, does anyone have any suggestion for lower-calorie soft drinks that do not contain any type of artificial sweetener? The only two I have found so far are Sainsbury's Taste The Difference Elderflower Presse and Lemonade, both of which are around 250 calories for 750ml (wine bottle size). I cannot bear the taste of any sweetener, apart from sugar, including Stevia etc. Any help would be appreciated! Thanks