What's remarkable here is that they do serve a valid certificate: https://www.ssllabs.com/ssltest/analyze.html?d=www.bom.gov.au&latest https://www.ssllabs.com/s

What's remarkable here is that they do serve a valid certificate: https://www.ssllabs.com/ssltest/analyze.html?d=www.bom.gov.au&latest https://www.ssllabs.com/ssltest/analyze.html?d=www.bom.gov.a... That's a different situation to that of the Italian Health Ministry mentioned in another comment.