Larzymodo on "Twenty Eleven Child Theme menu modification"

Hi All

http://myschoolweb.org.uk/wordpress/stjosephs/

I nearly have the site layout done, but need to move the the menu items so there is not so much space on the left of the home button.

So that the home button lines up vertically with the text content below.

Any help, would be really apprciated.

P.S I've tried to find this myself with firebug but I've not managed to find the governing rule.