A1: Ones cast to middle place (4 steps); circle left with threes (8 steps); lead to bottom.
A2: Ones cast up to middle place; circle left with twos; lead up to top.
B1: Ones cast to middle (4 steps); all circle left (12 steps).
B2: Four quick changes at the top (only two steps each). All two-hand turn. [As written, ones only turn.]
Sharp used the tune "Black and Grey". You can find the original tune at https://colinhume.com/abc.aspx?T=A_Trip_to_Kilburn_(original)