Sons of Ulster 

You better tell Boris.

SCOTLANDS C COKPANY DIE FOR THE ULSTER VOLUNTEERS FOR GOD AND ULSTER WE FORGET THEM NOT LEST WE FORGET

RANGERS FANS ARE THE BEST SINGING ALL NIGHT HERE TAV HAAS SEEN FANS ALL OVER THE PLACE BUT TAV SAID WE WERE SIMPLY THR BEST FANS US WE SANG LIKE WE WERE ON STAGE CAUSE WE WERE THE BEST FANS HES EVER SEEN TAV YOUR BRINGING HOME WE ARE THE FANS USE SEEN US ON TV BUT WE NO WERE ARE SUPERB FANS IN CAUSE WE NO WE ARE SIMPLY THE BEST SUPOTERS WESANG OUR HEARTS OUT BIG TAV HAS SEEN FANS BUT NO BETER FANS CAUSE WE ARE LOUD AND PROUD A

It’s an American civil war song, ‘The Battlecry of Freedom’. Both the Union and Confederacy had their own versions