Crumbs module won't display correct current page. Displays 'Anchor'
I found the answer to my issue after using the crumbs debug tool. I had stupidly named a link 'Anchor' when I was creating a menu and forgotten about this. This menu item was overriding the output I was looking for.

Here is my debug results if it helps anyone. Thanks to donquixote for pointing me in the right direction to use the debug tool.