anything with .php not redirecting

Hi,

This page: https://www.cheshireautopromotions.co.uk/vintage.php

Should be redirecting to the home page.

All redirects ending .php are not getting redirected, whereas everything else is, for example:

https://www.cheshireautopromotions.co.uk/admin/

Does redirect to the home page.

Is there a reason for this, and is there a solution?

Thanks

The page I need help with: [log in to see the link]