I have been searching and searching in the directory but cannot find the syn value for Asda, smartprice tuna chunks on a green day.. I'm sure it never used to be this confusing!
Ah-ha! It's a sneak, but if you just look on the generic tuna info rather than specifically for Asda stuff. All tinned tuna in brine is the same, regardless of manufacturer. All that matters is whether it's in water or oil