Ah Australia, well lots of space there, lots of sunshine. All of the UK is interconnected with the National Grid and has been for as long as I remember.
We have lots of interconnections with our neighbours, current and planned:
https://publications.parliament.uk/p.../121/12109.htm
Attachment 22534
and we can see exactly where our main power is coming from or at times being exported to:
https://www.gridwatch.templar.co.uk/
So at the moment I'm typing this we are exporting 3GW across the 4GW interconnector with France. Fortunately there is nothing connected to Russia or Ukraine.
When are you going to let WA join your interconnects? I don't know why they don't declare UDI.