The charity Save the Children has used full-page ads in numerous UK newspapers to name the hundreds of children killed in Gaza over the past month.
According to recent figures from the United Nations, 373 children have been killed during the four-week conflict.
Save the Children's CEO, Justin Forsyth, said: "To see the names of the children, some as young as a few months, written in stark black-and-white brings home the tragedy that has befallen Gaza's children."
"We condemn all indiscriminate attacks on civilians in Gaza and Israel and by publishing these names, we are reminding the world of the urgent need to push for a permanent ceasefire."
Gaza and Israeli officials agreed to a 72-hour ceasefire yesterday.
Save the Children has launched a petition calling on the UN secretary-general, Ban Ki-moon, to ensure a permanent ceasefire is put in place in the region.