2 couple dance in 3 or 4 couple set.
The original version of this dance was subsequently revised. In an email from Duncan Keppie he writes that “I substituted the Ancient Poussette for the Highland Pousette”. The PDF of
Haliburton SCD Book #6: Twenty-Ten
on the MiniCrib website still has the original version (as of March 2022). The instructions available at
https://www.scottish-country-dancing-dictionary.com/dance-crib/broome-rigg.html
have the later version with the Ancient Poussette.