style sheet not loading when viewed on LAN

I have set up a webserver using using ubuntu server 9.04 and apache2

I’ve set the url https://www.furthur.co.uk to point to my ip which all works fine

I’ve installed wordpress which works fine if you access using the
furthur url but if you try to access it internally using the server ip
192.168.2.110 it doesn’t load the style sheet.

It would seem that wordpress is tied to the url but I can’t use the
url internally as it simply opens up the router home page

any ideas?