My own attempt at a danceable choreography (2026-10-23) us a triple minor proper as follows:

A1 M1 between W2 and W3 to between C3 while
   W1 between M2 and M3 to between C2,
   Set to each other TWICE? (others??)
A2 C1 both cast R to 2nd place (C2 make room)
   Cross and turn L so M1 between C2, W1 between C3
   Set  TWICE?
B1 Cast over L shoulder and hey on own side (R Shoulder
   from middle position, which is finishing point)
B2 4 changes of R&L (top 2 couples)
   If 3C set, actives move to bottom at end R&L and
   C3 move up.

https://exploring-london.com/2015/03/27/lost-london-blackwell-hall/ says

 A trade hall for the wool and cloth trade, Blackwell Hall, also known as 
 Bakewell Hall, once stood on the east side of Guildhall Yard in Basinghall 
 Street.