No one seems to have mentioned:

Hello, hello, we are King Billy's boys
Hello, hello, we are King Billy's boys
Up to our necks in Fenian blood, surrender or you'll die
We all follow King William.

Or indeed the modification into a Luton Town Football Song

Hello, hello, we are the Luton boys
Hello, hello, we are the Luton boys
Up to our necks in Watford blood, surrender or you'll die
We all follow the Luton


Jon