If you're interested in working in the UK take a look at the GMC site. The GMC is similar to the AMA, except they have more authority over things such as degree recognition. (
http://www.gmc-uk.org) The site also has good links to other info.
Even as an MD you'll find it difficult - you don't find too many American docs working in the UK. Medicine in the UK still suffers from "the old boys" network, and an edo bigger than all outdoors.
Instead of an intern /residency / (fellowship) / attending structure they have a PRHO / SHO / registrar / consultant format. Even though this appears similar it's quite different - the biggest difference is that the "top" is pyramid shaped - not enough consultant positions. And you have to be an NHS consultant before you can engage in private practice. Consequently, many doctors get stuck in staff grade registrar posts at the end of their training - that's like completing your residency and being told you're staying as a PGY4 on $45,000 for the foreseeable future.
If you're from a "commonwealth" country (Australia, India,, etc) which also award the 5 year MBBS degree then you're ok. If you come from a different system - well, it can be an uphill struggle - but not always.
For example .... the UK has an admitted shortage of nurses and doctors. They have attempted to solve the nursing shortage by importing nurses from wherever they can - the nursing profession is not controlled by the GMC and the medical profession.
But even though Germany and Spain both have a surplus of doctors they have difficulty getting jobs in the UK - even though the EEC is meant to create open licensing agreements. (See:
http://www.gmc-uk.org/global_sections/sitemap_frameset.htm)
