Something that happened a few weeks ago but has slipped through the net is that Sainsbury's has announced an improved policy on light bulbs. By committing to phasing out those wasteful incandescent bulbs by 2010, they join Asda and Morrisons (who also recently shifted their stance) further up our league table. That still only gives them a D, but it leaves three supermarkets lower down - Tesco and the Co-op at E and Somerfield a disappointing F.

Meanwhile, there's been no further word from wooden spoon winners Woolworths since their CEO's response to our day of action, but we're still working on them. You may have been invited to sign a 'Seize the Light' flag outside you local branch, as groups of Greenpeace volunteers (like the Blackburn group pictured) have been collecting signatures to show Woolworths that their customers want them to help everyone improve their energy efficiency by getting rid of out-dated, inefficient light bulbs.

If you haven't emailed Woolworth CEO Trevor Bish-Jones, now's the time - everyone who's done so has received a personal response, and you could be one of those lucky people. Or if you fancy a bit of flag-signing, contact your local Greenpeace volunteer group and find out how you can help everyone make the switch.