How to play Rule Britannia (a) in Roblox
Copy the music ID above, then paste it into any boombox, radio gamepass or game that accepts song codes. In Roblox Studio, insert a Sound object and set its SoundId to rbxassetid://1841049961.
More marches music IDs
1836564219Working1836564145Working1845479224Working1838226426Working1844434655Check pending1836564170Working