Moving to Australia to be an Accountant

#1

I am English and I have just finished my accounting degree in the UK but I am considering moving to Australia to start an accounting graduate scheme.

I intend to apply to the Big 4 to start in September 2013, as would be the case if I were to remain in the UK. However, I have some questions regarding starting my career in Australia:

Is it possible to apply to a firm (eg Deloitte) both in the UK and Australia at the same time or must I only apply to one country?
If I qualify (in audit) in Australia would I have the CA qualification?
Will this qualification be transferable if I choose to return to the UK after the 3 years of training?

I was going to contact an accounting firm directly to see what my options would be but I am reluctant to sound uncertain about what I want to do when speaking to a potential employer. Any help anyone can give would be greatly appreciated.

#2

Can you just apply to work in Australia like this? Are there no visa implications and what about interviews… would you fly there for these?