Thanks for your question.
As you are ordinarily resident in the UK you will be subject to UK tax and must pay tax in Uk.
Does the Australian company have an office in the UK? If yes, the employer will pay paye and NI contributions to HMRC.
If not, the situation is more complicated. You will need to set up some sort of self employed status or service company. You would the have to inovice the Australian company. You will need to speak to HMRC and an accountant to set up the correct arrangement.
I hope this helps.
Do let me know if you have any queries in relation to my reply.
Please can I ask you to accept / positive rate my reply.
Good luck with the new job!
Please can I ask you to accept /positive rate my reply. This is how the professionals on JA receive credit for helping people.
Hi Lauren, sorry to follow this up. Please can you accept /positive rate my assistance. I will not receive credit for helping you otherwise. Many thanks.