Watching UK TV in Australia

Many streaming services are intentionally geo-restricted by country or region - often due to copyright or broadcasting licence restrictions. By example, BBC's content funded by the UK Licence fee is legally only available within the UK.

While some restrictions can be circumvented using some VPN or Proxy service, others may fail. Geo-restricted streaming platforms actively attempt to detect and block known VPN and Proxy IP Addresses. Any errors that you see may be misleading - will not necessarily indicate the true cause of failure.

While sympathetic to your predicament, be mindful of the Apple Support Community Terms of Use (the link appears at the bottom of every ASC page):

Apple Support Communities Use Agreement - Apple Community

Specifically, the section B. Submissions, 8 ii explicitly states...

Do not submit software or descriptions of processes that break or otherwise ‘work around’ digital rights management software or hardware. This includes conversations about ‘ripping’ DVDs or working around digital rights management software used on Apple Music or other media sources.

As such, I and others are unable to provide more explicit guidance. Sorry.

Your description suggests that the Broadcaster's App has detected that you are outside the geo-restriction boundary - or that a VPN Provider's IP Address has been detected. While the App itself will run, access to the geo-restricted content is being denied.

With what you are attempting to achieve, past performance is not a reliable indicator of continued access to geo-restricted content. It's a cat-and-mouse game between the Broadcasters and the VPN/Proxy Providers.

Try using a different VPN Provider.