Whether, UK universities accept work experience overseas is accepted or not- all experience is valid and will grow your knowledge of medicine holistically. It is not the work experience, but what what you learn from it that matters! I think that comparisons between difference healthcare systems are enormously beneficial and will help you to provide informed answers during interview stations. As well as the above, voluntary work in a local care home would be good use of your time.
Good luck and take a year out if necessary. My daughter took a year out to work, volunteer and travel and she was so prepared for med school when she started.