Changing blog post layout

Hiya,

I was wondering whether it was possible to display the blog lists differently. At present the featured image is displaying below the excerpt: http://tessaclements.co.uk.gridhosted.co.uk/edit/page/2833 but I'd like to move it so it is to the left of the excerpt - so that it's laid out like this: http://www.saraheverettphotography.co.uk/blog/

Is that doable? Thanks, Stacey