Hello from the UK.

I am looking for more information on S Berwick Red. Solely because my hometown is Berwick upon Tweed. Am I right in thinking it's a Australian cultivar?

Hi @sempmindfulness, so nice to meet you.
It does appear to be an Australian cultivar. So far I have not found any information on who the breeder is. It looks like a typical tectorum type semp.
We would love to see a photo of yours.

Unfortunately I haven't been able to find it in the UK.

Let us know if you do find one.