UK CAA/JAA flight tests overseas???

[nad]

Hi all

What are the rules regarding sitting UK JAA flight tests outside of the UK and Europe for that matter.
Looking to renew my UK MEIR and then sit an ATPL flight test if possible down under.
Probably a long shot but wanted to check before I look at having to sell a kidney to finance travelling back to blighty to do it all there.

Thanks in advance for any info