Hi Lauren,
Are you researching for a documentary about incoming UK medical tourism or medical tourism in general?
If so I suggest you contact the top UK private medical clinics and you might also want to seek assistance from the Film Commissions in the middle eastern countries you mention that can be found i The Location Guide directory above. Also try the commercial departments of UK embassies in those countries who maybe assisting these UK medical establishments in promoting themselves to potential ME customers.
Good luck.
Best,
Murray