Are the blues really becoming green? After his dog-sleigh ride to see melting glaciers in Norway yesterday, UK Conservative leader David Cameron, called for international targets to cut carbon emissions, as well as his support for a levy on carbon use.

In a speech today in Oslo, he will also say: It is possible to take a lead and make a difference. We can change how we get around; we can change how we build our homes; we can change our lifestyles, change our industrial processes. It’s called progress”.

So the Conservatives are trying to outplay Labour for the green vote – and the scary thing for Tony Blair and Gordon Brown is that they might just be succeeding. The nearest Blair has been to a melting glacier is on a skiing holiday in the Alps.