princes

Update, 9 March 2011: both Princes and Asda have committed to removing tuna caught using fish aggregating devices in combination with purse seine nets from their supply chains by 2014. Read more >>

Having got wind of our new tinned tuna league table (see below) and the fact that it was going to come last, Tesco has done a spectacular u-turn. After being the subject of a Greenpeace investigation, it has radically improved its policy on the fishing methods it will permit for its own-brand tuna.

Two whole years in the making, Princes' new 'sustainable seafood statement' was supposed to address many issues. Specifically it was supposed to be explaining just what the company intended to do to drag itself from the bottom of our tinned tuna league table by explaining the measures they were implementing to ensure they were sourcing their tinned tuna responsibly.

Another tin of tuna, because we know you can't get enough of these pictures

The old saying about a can of worms, is based on the idea that once you open said can, it's impossible to get the worms back in and close it again. Who knew that was true of cans of tuna too?

But fresh from our update on some of the international branded laggards yesterday, comes some news of more developments from some of the UK retailers.

There's a well-known model of how dodgy big business deals with campaigns against them. To summarise, it goes a bit like this:

• Company X gets some bad press for doing something wrong, especially bad press if it kills lots of charismatic megafauna;
• Company X initially retaliates saying, 'It's all lies, honest';
• Company X then admits it isn't all lies, but comes up with some way of kicking the issue into the long grass, usually some commission or foundation (ideally with a word like 'conservation' or 'sustainable' in its title) or some interminable period of gathering research, in the hope it all blows over and people forget what they were upset about.