A Webmaster World thread talks about an issue that is unique to UK based site, within the Google searh results in UK. It says about the search result of Google when specified as 'pages from UK'. The search provides you with the lists of all pages except the home page. The issue elaborated in the thread is as follows
A site:domainname search lists the pages in the site ok when performed in the default search, but lists all pages APART from the homepage when done with the 'pages from the UK' option. Also, a search for the domain name shows the homepage in the #1 slot in a default search, but a search for the domain name using the 'pages from the UK' option shows the same list, but no homepage anywhere.
The site is hosted in the UK on a shared IP, physically located in the UK. I have located other .coms on the same IP and their homepages show up fine when the domain name is searched for using the 'pages from the UK' option.