I have contacted this society on facebook. When I asked whether the society promotes wild or pet type budgerigars or the cobby show type but in a smaller size they replied:
Personally, I prefer the bigger birds but it looks interesting. The budgerigar may split into distinct show breeds as opposed to different colour varieties (+crests, longflights etc). There are dozens of canary, pigeon and poultry breeds in the world and it appears that soon there will be more than one breed of show budgerigar.
Drogo