{{explanation}}
3s & 4s on opp sides

1-8
: 1s & 4s cross RH & cast in 1 place, 2s+1s also 4s+3s dance 1/2 R&L
9-16
: 1s & 4s pass RSh & dance 1/2 reel of 3 with 2M/3M, 1s & 4s pass LSh &
  dance 1/2 reel of 3 with 2L/3L ending 2s at top, 3s at bottom & 1s+4s
  in line in centre (Ladies BtoB)
17-24
: 1s+4s set & 1/2 turn partners RH & dance 1/2 reel of 4
25-32
: 4L also 1L followed by partners dance out ends round to right to dance
  Tandem reels of 3 across with end couples & end 2 4 (1)(3)