Stop is_front_page || is_home returning TRUE on posts page

Hi,

Under Reading Settings, I have set a static homepage and blog page which is causing is_home() || is_front_page to return TRUE on the defined posts page.

Is there a quick code snippet which can be used to stop this returning TRUE so the code in the header will only appear on the homepage and not on subpages?

I can cheat and remove the posts page (and therefore need a custom page template to add the blog page) but surely this functionality is either built in or can be filtered?

Many thanks,

James