Whilst I believe there is a brand of Peanut butter known as "Sunbutter" in the UK I had not heard of sunflour seed butter before. Someone on the Facebook Recipe Resource group posted about this and it sounds such an excellent food for all, for toddlers as a nutritious dip or spread, for school lunch boxes and for anyone with a penchant for nut butter who needs to eat nut free or in a nut free environment.
Another recipe I have not yet had the chance to try but I'm off to buy the sunflower seeds tomorrow!
All info with step by step instructions here