Also by jamie

Not all of us can scamper up an oil rig's anchor chain - but we can all come up with ideas, and we need yours asap.

As our occupation of Chevron's massive drill ship goes on, we want a banner slogan from you to explain what our politicians need to do about deep water drilling.

As you probably know by now, the ship our climbers are currently sitting on is the Stena Carron, a 228m drill ship operated by US oil giant Chevron. Texaco, its petrol station subsidiary, is perhaps the name you may be more familiar with, but here are a few facts about the company that you might not know.

Chevron's boss, John S Watson, is a director and member of the executive committee of the American Petroleum Institute (API). The API is a major lobby group funding research which seeks to undermine the scientific consensus on climate change.

Greenpeace activist Victor, hanging off Chevron's Stena Carron rig

A few moments ago, our activists started taking action against a massive oil platform, stopping it from drilling a deep water well off the Shetland Islands.

Using speedboats to reach the huge 228m long drill ship, they climbed up the giant rungs of the anchor chain, and are now preventing the ship from moving to its drill site.

It all started two days ago, when a handful of activists slipped off the Esperanza - which we knew would be monitored - and boarded a ferry in Aberdeen bound for Lerwick in the Shetland Islands.

Then this morning, at a sign that the drill ship was about to move, they started the action.

Victor, one of the climbers, describes what it's like on the Stena Carron's anchor chain

The ship is operated by oil giant Chevron, and was due to sail for a site 200km north of the Shetland Islands and drill a well in 500 metres of water.

More than 10,000 of us have sent an email to Chris Huhne - the Energy Secretary - calling for a moratorium on deepwater drilling in UK waters.  On top of that, last month we sent a letter to the government threatening legal action in an effort to stop the granting of new permits for deep water drilling.

But it's not enough. Deepwater drilling is continuing unabated.

We saw what happened in the Gulf of Mexico only a few months ago. The world's biggest oil spill - a direct consequence of reckless deepwater drilling. It's time we go beyond oil and stop gambling with our environment and the climate.

Follow the latest at GoBeyondOil.org and find out how you too can take action.

If you're on London's South Bank over the next few weeks, watch out for a new open air exhibition featuring the work of regular Greenpeace photographer Jiri Rezac. He's been to the tar sands works in Canada and the images he's brought back clearly show the extent of the devastation caused by this insane venture to both the environment and local populations.

The slideshow above is just a taste of Jiri's work featured in the exhibition which you can see near City Hall by Tower Bridge until 14 October. It will then be touring around the UK - details are still to be confirmed but check the Tarnished Earth website for updates.