- The new arrangement is being announced by International Development Secretary Justine Greening
- Doctors, nurses, surgeons, anaesthetists and other staff can now pre-register
- They can sign up to the UK's International Emergency Trauma Register and indicate their availability
- Medics could then deploy rapidly to the scene of emergencies such as tsunamis, earthquakes and floods
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The launch was made in defiance of United Nations sanctions barring North Korea from using ballistic missile technology.
David Cameron has raised concerns after figures showed 100 babies spent time living behind bars last year.
About 124,000 patients had to wait for at least 12 hours in accident and emergency departments last year, according to an investigation.