Briefly:
1) a flight test (plus the usual bollocks they'll make you do before recommending you for a flight test)
2) no - you must redo all ATPL exams - they only start making dispensation for unfrozen ATPLs and LOTS of exams.
References
- Altlantic flight training website has a section on their courses for converting non-JAA licences to JAA (not necessarily a recommendation for AFT though)
-
www.caa.gov.uk - search for a document called LASORS - it's the bible of the UK licensing system.
Also remember that if you're going for a UK CPL then your initial medical issue MUST be done by the CAA medical section at Gatwick airport (your Oz medical is not ICAO compliant and so not valid) - I don't believe there are any exceptions to this rule (I don't know how WAAC get around this for Oz based students).