Pages & Custom Post Type Pages not realising parent

Hi everyone,

Having an issue with a site where pages which are custom post type templates and templates which pull in posts from a category or categories don’t realise they have a parent page above them.

I have used $parent=$post->post_parent; and then echoed it and it displays the parent id as 0, even though the page is a second level of third level page with a parent.

Can anyone shed any light why this might happen?

Cian