How long does it take a sea mail package from Australia to London?

There is no sea mail service from Australia to London as of my last knowledge update in September 2021. Airmail is the primary method for international mail delivery, and it usually takes between 5 to 10 business days for a letter or package to arrive from Australia to the United Kingdom.

Please note that mail delivery times can vary depending on various factors such as customs clearance, flight schedules, and any potential disruptions or delays. It's always best to check with the postal service or a reliable courier company for the most up-to-date and accurate information on delivery times.