Display full posts on homepage

Hi,

I have a blog here http://vardis-drivingschool.co.uk/ and at the moment on the homepage it is showing the latest posts on the homepage, which is what I want.

But it's only showing a snippet of the posts (http://i.imgur.com/S5ltx3j.png)

I want it to show the whole posts, like this: http://i.imgur.com/V5zuGma.jpg

How do I do this?

I've tried setting the reading settings like so: http://i.imgur.com/G9yN5Q6.png

and then I tried changing it inside the theme options (http://i.imgur.com/7wheWyC.png)

but no such luck. Any idea how I can easily do this? I need to make this change on a lot of websites

Any help is appreciated, thank you