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Meet the British workers who tested their skills to the limit abroad, and their hosts who showed them the ropes.
Angie's swapping her Welsh ambulance for the murderous streets of Guatemala
Paramedic Wilfredo Ponce helps victims of shootings and traffic collisions in Guatemala
'Archie''s day job is in sales - but at the weekend he fights fires.
Suzanne leaves the order and cleanliness of her hospital to go out on the road in Liberia
Liberian midwife Lucy works tough 16 hour shifts. She says her faith helps her save lives.
Londoner Josh's driving skills are tested to the limit in Manila
Rogelio lets Josh drive his Jeepney in Manila, the world's most densely populated city