The UK has a population of 67mil. Australia has 25mil.
The UK as an area of 97 thousand square miles. Australia has almost 3 MILLION square miles.
In Australia the problems, as I see it, have beem worst in the big cities, Melbourne and Sydney,
In Uk our least affected area has been the Highlands and Islands in Scotland.
At this stage my knowlege of Australia gets too thin to be sure but I'm guessing that the road system is rather more spread out than it is here in UK. I ASSUME that there are fewer roads.
For example, taking your inter County Travel idea ,does The UK have enough Police/Military to enforce this?
I like your idea, but I don't think it is feasable.
Even New Zealand, with their Brilliant PM, has needed Geography to be successful in controling this virus.
Here in The UK, the geography is against us, assisted it's true, by some bloody mindedness from idiots.
These may not be too much of a problem as the fools are something of a dying race.