Hey there! I'm not quite sure what stage internhsip is, so I'll do a potted history of steps to consultant-hood in the UK :wink:
Whn you graduate from med school, you become a pre-registration house officer, or PRHO, which you are for a year, and you do 6 months surgery and 6 months medicine. After that you get your full registration with the GMC and become a senior house officer, or SHO. These people make up the majority of junior doctors. They do rotations towards what they want to specialise in, for example, if you want to be an Orthopod, then you do a surgical rotation, which would have 6 month placements in General Surgery, A&E, Orthopaedics, Platics, Obs & Gynae etc. You are an SHO for a MINIMUM of 3 years (usually a few more) and have to take various exams to become a member of your respective royal college (for example, if surgery was your bent, then you'd take your MRCS (member of Royal college of surgeons) parts 1 and 2. Once you've done your exams, you look for a Specialist Registrar (SpR) post in the speciality you want to be in eg Ortopaedics. You get to take more exams to become a fellow of your royal college (so that'd be your FRCS) and once you've got your exams and been an SpR for a min of 3 years, you finally get your certificate of higher training (your exit cert) and can apply for a consultant's post in whatever speciality you trained in (but not in any others, as appears to be the case in the US, though don't quote me on that, I'm not sure I'm right!).
Anyway, the biggest hurdle for SHOs and SpRs is passing the exams - there is at least a 50% failure rate.
To answer your question specifically, there shouldn't be any problem for you to come over here, unless perhaps if you want to work in London (although why anyone would I don't know!) The UK, as you may be aware, has a shortage of doctors, and so they welcome you with open arms. I know there is no problem with UK docs going to Oz to do part of their training, so I shouldn't imagine there would be in the vice versa situation.
Just to clarify, would you be coming over here permanently, or just to do some training? If permanently, you would need to get onto a proper training rotation (which won't be any more difficult for you than any ordinary UK doc, unless you have really dire grades
), but if temporarily then you need to check with whatever training authorities there are in Oz as to what exactly they would require in your placement, and then you are able to apply to all the non-standard SHO posts. It's relativley unlikely that you'll get on a PRHO scheme, as they are all full with UK grads.
Anyhow, if you want more info, post again here, or if I take too long replying, go the the thread mentioned in this post 'cos I visit that site more than this! Hope I helped.