Hi Starzia - thanks for the advice. I was a regular tuna eater before and am still eating my stocks at work. I don't have it every day but probably 3 times a week (work mon to fri). I read in Kaz Cooke's Up the Duff book that tinned tuna was ok.....at least I think I read that. Will need to go back and check it.

Do you have more information about why tuna (tinned and I assume fresh as well?) should be limited? I will be really disappointed if I have to cut back. They're so good for you normally. Also, what do you mean about smaller fish? I had sardines on toast for breakfast the other day - are they better? Ta.