Unicef's communications manager Tess Ingram has been describing the conditions in Gaza as the ceasefire comes into effect. She tells the BBC's Lyse Doucet that it is "incredibly crowded" in al-Mawasi in southern Gaza, where she is working, with many people displaced in the past several weeks. People are living in "really difficult conditions" - sleeping under sheets of tarpaulin with little else to keep them warm, while others walk without shoes through the rubble, according to Ingram. "We've been restricted with what we can bring in and what areas we have access to," she says. Ingram says that in the coming days, Unicef is going to mobilise supplies, including shoes, clean water and food to address the crisis.