I don't necessarily agree we can have an Australian plan as such, I'm in WA and our economic priorities / geography mean our strict and early lockdowns really do make sense, as much as there has been quite a bit of finger pointing at Mark McGowan for overreacting. WA is 12 times bigger than the UK, but population is only about 3 million, so we have geography on our side in terms of being able to prevent spread, but would make any outbreaks in rural / indigenous communities extremely difficult to treat.
We're also dependent economically on oil and gas and mining more than other states, if we have to slow output / shutdown any sites due to outbreaks that would have far more of an impact than any others (particularly iron ore). This also increases the risk of the virus getting into the more isolated communities, as the same towns that service them, also tend to be hubs for many of the FIFO, places like Port Headland, Karratha, Broome etc. There are places that can be closed off for weeks on end depending what's happening with the rivers, it could really be devastating if it was passed on at the wrong time. A friend of mine is senior in department of Communities, and was heavily involved in discussions and planning in Jan / Feb 2020 and these considerations played heavily in decision making on how to handle the virus.
I'd also say our hospitals are stretched as is, ambulances are already ramping at record levels, and there's really no other option than Perth for ICU for the whole state, what would we do if that gets over run? Again, where our isolation helps keep it out, it would be a huge negative if it did take hold.