A British diplomat has resigned, charging the U.K. government of complicity in war crimes amid its continued military aid and arms supply to Israel. Mark Smith previously worked in Middle East arms export licensing assessment for the British government, and said he raised his concerns, including to Foreign Secretary David Lammy, but was ignored. He recently spoke to the BBC.

Mark Smith: “For me, personally, my profession, or former profession, as of last week, was to advise the government on the legality of arms sales. And when you look at what constitutes a war crime, it’s actually quite clear, even from what you see in open source on the TV, that the state of Israel is perpetrating war crimes in plain sight.”