Permanent visaholders who are tax residents of Australia should complete UK Revenue form FD2 so that UK source pension income is paid on a gross basis (ie no tax deducted in the UK).
You can obtain form FD2 from the UK Revenue website (www.hmrc.gov.uk)- type FD2 into the search box.
Tax is then payable wholly in Australia.
Note that tax that has been paid in the UK under the PAYE system since you have been a tax resident of Australia holding a permanent residency visa should be repaid to you, as it ought not be claimed as a credit against any Australian tax liability.
The above flows from the Tax Treaty between the UK and Australia.
Feel able to contact me via our Perth telephone number if you think you might need some formal assistance completing forms, etc - 08 9261 7762.
Best regards.
Alan Collett
alan-at-gomatilda-dot-com
Registered Migration Agent Number 0102534
Fellow of the Institute of Chartered Accountants in England and Wales
Member of the Institute of Chartered Accountants in Australia
http://www.gomatilda.com and
http://www.collettandco.co.ukOffices in Southampton - England; Melbourne, Perth, Brisbane, and Geelong - Australia