When they call the referendum, and I'm asked to make my mark.
With my little stub of pencil I'll be there.
When it's "d'you want rule by Brussels, or a leap into the dark?"
With my little stub of pencil I'll be there.
   I'll be there, I'll be there.
   With my little stub of pencil, I'll be there.
   When they call/hold the referendum
   With my little stub of pencil, I'll be there.

Just a starter.
Feel free to add to it, or use it, it'll only be topical for a short while!