proper permissions under HTTP root with Apache2 + FastCGI + Suexec

I currently have a setup which runs Apache2 + FastCGI PHP + Suexec. As an example, I'm using /mnt/data/www/vhosts/inflex.co.uk/htdocs as a DocRoot for one of my virtual hosts. I have a script /mnt/data/www/php5-cgi/inflex.co.uk/php5-cgi which contains: #!/bin/sh exec /usr/bin/php5-cgi The account the scripts should run under is duncan, this file is owned by duncan and also in the group duncan. It has -rwxr-x--- permissions. .../www/vhosts/inflex.co.uk and ../inflex.co.uk/htdocs is owned by duncan and in the group duncan. If I remove all access for others, such as chmod 750, I get an error regarding permissions when trying to access the website, if I allow read/write for others, 755 say, it works. I'm assuming this is an issue with www-data (apache2 user) accessing the directory, but I thought the point of Suexec was that all of this was ran under a seperate user, or does www-data require read (maybe write?) on the folder and then executes PHP php file as the user?