in a website a work with, I found non-existent URLs (containing
a valid parent path) that return a status code 200 , not 404. Pages which
should be registering as 404s, are instead showing as 200 status codes (with
duplicated content from the closest parent page).
www.example.co.uk/contact-us >> 200
www.example.co.uk/contact-us/this-should-be-an-error >> 200