{{explanation}}
Only Ladies progress, Men maintain position & shape of set

1-8
: All set to partner & turn RH. Men dance LH across in centre back to
  place
9-16
: All set to partner & turn LH. Ladies dance RH across in centre flowing
  into …
17-20
: Ladies pass partner RSh, pass next person LSh & turn next person 2H once
  round
21-24
: Repeat bars 17-20. Ladies have moved 1 place clockwise to dance with new
  partner. (1L with 2M, 2L with 3M, 3L with 1M)
25-32
: All set in circle, circle 6H round for 2 bars, dance into centre, pull
  RSh back and spiral out & chase round following each other into place

{{explanation}}
(Men in original places, Ladies have progressed)