Radio

DAB Radio

The UK mainly uses the older DAB standard which uses the MPEG-1 Audio Layer 2 audio codec.

Australia uses the newer DAB+  standard which uses the HE-AAC version 2 audio codec, commonly known as 'AAC+'

However, all is not lost. Most new receivers are both DAB and DAB+ compatible whilst many older receivers can be updated to the newer DAB+ standard via a firmware upgrade.

Another issue to consider is coverage - if you're regional you've no chance of receiving a signal.

You can check coverage at http://www.digitalradioplus.com.au/can-i-get-digital-radio

AM / FM Radio

AM & FM broadcasts are widely available in Australia so there is no issue fetching your analogue radio.

Television

Analogue

Analogue Television Transmissions were phased out in Australia between 2010 and 2013. Therefore if you have a very old television that can only receive analogue signals, you'd need to use a set top box in order to receive the Digital transmissions in Australia.

These can be purchased very cheaply in places such as https://www.jbhifi.com.au/?q=set top box& for $49.

However, bear in mind that the SCART connection standard was hardly utilized in Australia and as an old analogue TV won't have a HDMI connection, you'll have to check that you can connect the STB to the TV using composite video and L+R audio (the Yellow, Red & White cables)

Digital

Digital TV broadcasts in Australia go under the name of Freeview (as they do in the UK), the idea being to bring all of free-to-air (FTA) broadcasters onto a consistent marketing platform. 

The first new "Freeview" channel started on 26 March 2009 with the first Freeview certified devices appearing in retailers from May 2009.

In June 2010, the second phase of devices, marked as "Freeview EPG" devices, became available in retail stores, designed to work with the newly launched interactive EPG built on MHEG-5, although this Freeview EPG will cease operating on November 24, 2017

Freeview is now focusing on its new Hybrid Broadcast Broadband TV (HbbTV) FreeviewPlus service which was launched in 2014 and incorporates an onscreen guide.

New Freeview certified devices must be capable of receiving and decoding H.264/MPEG-4 AVC, as opposed to the current MPEG-2.

Australia originally started broadcasting HD content over MPEG2, although in 2015 some Australian broadcasters switched to MPEG4.

So does this mean I can use my UK digital TV in Australia?

Definitely if you use an external Set Top Box to receive the Free To Air (FTA) digital channels.

Without the use of a Set Top Box, then you may possibly be able to receive the TV channels (it depends as to the model of TV) due to the changing video & Audio codecs being used in the UK & Australia.

Some people report being able to receive a picture but no sound, but by setting the TV to "germany' they get the sound as well. Again, the problem is easily alleviated through the use of a cheap external STB.

Want to watch British TV in Australia?

Check out: https://www.pomsinoz.com/topic/194613-want-to-watch-british-tv-in-australia/

DVD & Blu-Ray

Europe & Australia are in the same Blu-Ray Region (B/2) so there is no compatibility issue with regards playing Australian Blu-Ray discs on a UK Blu-Ray player.

The UK & Australia are in different regions for the DVD format (Europe Region 2, Australia Region 4)  so unless you modify your UK DVD player to be multi-region/region free or the DVD says it will play in both regions, then you can't play an Australian DVD disc in a UK player.

Power

• If you're fetching a radio, TV or STB from the UK then you won't have any power concerns, you'll just need to use a travel adaptor or change the plug or cable to make it work in Australia. The UK uses 230 V +10%/−6%., as does Australia (since 2000) As in the UK, 240 V is within the allowable limits and "240 volt" is a synonym for mains in Australian and British English.
• N.B. For disclaimer purposes, check if it is actually legal for you to rewire a plug in your state, you make technically require a licensed electrician to do it. eg. see https://www.worksafe.qld.gov.au/injury-prevention-safety/electricity/homeowners-and-consumers/dontdiy
• Also, the use of a travel adapter should probably be seen as short term measure as there has been some discussion with regards to household insurance if they're the cause of a fire for example - possibly because adapters purchased overseas may not be licensed/built to Australian Standards. Adapters can be readily purchased in Australia. eg - https://www.bunnings.com.au/korjo-eu-uk-usa-japan-to-aus-travel-adaptor_p4420319