A weighty issue: is there something fishy about tins of tuna?

Are we getting the exact amounts promised by food manufacturers? We look at accusations about John West chunksRoss Jennings is a fan of John West canned tuna. He’s doing the 5:2 diet and eats two or three tins a week, weighing them so he can stick to his regime accurately. And over 18 months, he says he has found a pattern that can’t be just chance.The graphic designer from east London says: “Whenever I use John West tuna chunks, the drained weight is usually around 90g –