Wouldn't be surprised if HDY (and VIC) delists/is kicked out and moves to the London Aim (not ideal).
https://www.londonstockexchange.com/companies-and-advisors/aim/aim/aim.htm
In terms of HDY, note that Greatland Gold (the other player outside Rio who has hit pretty good grades in in the Patterson Range) is listed on the Aim - https://greatlandgold.com/.
Can't see this listing anytime soon an the ASX so alternatives are likely (just like VIC who I hold unfortunately).
All IMO