As a citizen of the UK/USA/Canada/etc I don need a visa to enter Australia, right?
Australia enforces a universal visa system. This means that every non-citizen requires a visa to enter and remain Australia, either temporarily or permanently. Almost every non-citizen will need to apply for a visa of some sort before entering Australia. The only notable exceptions are New Zealand citizens (who do not already hold Australian permanent visas or citizenship) who are granted Special Category Visas (SCV) upon arrival. SCVs are temporary visas allowing the holder to stay indefinitely in New Zealand but are not permanent visas.