changing location

You won't lose any apps by changing location. You may not be able to update the apps if the version in the Australian store is different than the version in the UK store.

You need a zero account balance and you need to cancel all your subscriptions. If you have cancelled all subscriptions, but some haven’t expired, contact iTunes Support. You need a valid credit card issued by a bank in the country the store is in and you need a billing address in that country. If you have an account balance, either buy something more expensive and pay the balance with a credit card or contact iTunes Support and ask them to zero balance your account.

Purchases - View, change, or cancel your subscriptions.        

Purchases - Subscriptions not billed through Apple     

Region - Change your iTunes Store, iBooks Store, or App Store country or region.     

If necessary, contact iTunes Support. Follow through the screens to get a chat or telephone option.  

iTunes Support – world wide   

Apple Support schedule phone call     

Since you are interest in changing your location, see Change your Apple ID country or region https://support.apple.com/en-us/HT201389. Note that, while you won't lose apps when changing your location, there are many other things you need to be aware of. See this heading especially What to do before you change your country or region.

·      Spend any store credit remaining on your Apple ID. Learn what to do if your remaining store credit is less than the cost of a single item.

·      Cancel any subscriptions, including Apple Music, and wait until the end of the subscription period. 

·      Wait for any memberships, pre-orders, movie rentals, or Season Passes to complete, and wait for any pending store credit refunds to process.

·      Make sure that you have a payment method for your new country or region.

·      Redownload your apps, music, movies, TV shows, and books on any devices that you might use to play or read them in the future. That's because some types of content might not be available in your new country or region. (Learn what types of content and services are available in your new country or region.)

Use this link in the document if you need to View your Apple ID balance https://support.apple.com/en-us/HT202359

If you can't complete any of the steps, can't change your country or region, or you have less store credit than the cost of a single item, contact Apple Support.

You also can use Apple Support Twitter https://twitter.com/AppleSupportand

iTunes worldwide support to get help for text, chat, or phone support using this link https://support.apple.com/choose-country-region/itunes. At the bottom of your screen, use Tell us how we can help to select among support options.