Develop a musical composition in line with the pre-defined arrangement and stylistic preferences.
'Sectional: Through Composed'  
X:1
L:1/8
M:4/4
K:Bb
 D/E/ |"Bb" F>G F>D CD/E/ F>D | F>G F>D"Cm" G/F/E/D/"F" CD/E/ |"Bb" F>G F>D"F" F>G"Gm" B>c | 
"Bb" d>B"Eb" e/d/c/B/"Bb" F<B B D/E/ |"Bb" F>G F>D CD/E/ F>D | F>G F>D"Cm" G/F/E/D/"F" CD/E/ | 
"Bb" F>G F>D"F" F>G"Gm" B>c |"Bb" d>B"Eb" e/d/c/B/"Bb" F<B B || g | 
"Bb" f>B"C7" e/d/c/B/"Bb" F>B D>g | f>B e/d/c/B/"C7" g>c"F" c>b | 
"Bb" f>B"C7" e/d/c/B/"Bb" F>B D>B |"F" A/B/c F>e"Bb" d<B B>g |"Bb" f>B e/d/c/B/ F>B D>g | 
 f>B e/d/c/B/"C7" g<c"F7" c>e |"Bb" d<f"Eb" e>g"Bb" d<f"F" c>d |"Bb" F>G"Eb" B>c"Bb" d<B B |] 
[M:4/4][K:Dmin]"^Buckingham House" E/ |"Dm" F>D D/D/D A,>D D>E |"Dm" F>D D/D/D"Gm" G/A/B"A7" A>G | 
"Dm" F>D D/D/D A,>D D>F |"C" E/F/G c>G E<C G3/2 :| E/ |"Dm" D<d d>c d>e d>c | 
"Dm" A<d d>e"Dm" f>d"A" e>^c |"Dm" d>d f>d"C" e>c"Dm" f>d |"C" c>d c>G E<C G3/2 :|  