. >> the uk's largest delivery of aid arrives in gaza as america's top diplomat visits saudi arabia amid a renewed push for a cease-fire. also coming up, the u.k. government has banned 15 synthetic opioids as a bbc investigation reveals its data may be underestimating their spread. ♪ hello and welcome to the world today. an hour of international news from the bbc. i'm samantha simmonds. sudan's conflict is described as the war the world forgot. civilians caught up show graphic accounts of rape, ethnic violence, and street executions at the hands of our sf. we will show you testimony, but top united nations officials met today, saying the war has plunged the country into one of the worst humanitarian nightmares in recent history. >> this is the fastest displacement crisis in the world today. all the positive indicators, access to health care, reproductive health, we have seen these rapidly declining and what we see our negative indicators, malnutrition, child protection issues, access to health, and rising food insecurity. these negative indicators on the rise. >> since april last year,