As an admin I want to have the ability to customise our own 404 error pages so that I can occasionally refresh/change the look of the page and run experiments.

As a user
I want the page to have a title
So that I have some leading text such as Oh Dear...

As a user
I want the page to have some descriptive text
So that I read about why I got here

As a user
I want to see some informative links
So that I might navigate to a relevant place

As a user
I want there to be a search box
So that I can search for the content I might have tried to access

As a user
I want there to be a background image
So that page looks more appealing

As a user
I want there to be a coloured gradient
So that the design has a nice appearance