The melody of They’re Changing Guard At Buckingham Palace by A.A. Milne runs 256 notes across 25 bars, 2:48 long in G at 80 beats per minute. The tab sits almost entirely in the first two frets, one note at a time — no chords to barre and no strumming pattern to keep up with. A piano backing track plays the chords and bass underneath, so the line you are learning sounds like the record even at half speed.
Prefer to strum and sing it instead? They’re Changing Guard At Buckingham Palace chords and lyrics.