Organic/natural protein shakes available in the UK?

My trainer has persuaded me to try forgoing my beloved juices (and all other forms of sugar fruit or otherwise - yikes!) for a little while in order to really get my metabolism going and boost lean muscle and slim down. I try to eat as clean as possible and although I'm up for trying a daily protein shake I really don't want something chemically,full of carbs or has added sugar (including stevia).

Can anyone suggest any responsible brands that do good quality chemical and sugar free products? I quick search online and I came across this
http://www.amazon.co.uk/Sunwarrior-Warrior-Blend-Chocolate-Powder/dp/B005XA4FQW/ref=sr_1_1?ie=UTF8&qid=1398444883&sr=8-1&keywords=sun+warrior
anyone tried this one? (I'm not vegetarian/vegan or anything so if a whey product is actually better for the body I'd be happy to try that instead)

Do you think one with raw cocao counts as sugar? I don't know if I can cope with going cold turkey completly! :ohwell:

Thanks!