Hundreds of thousands of Palestinians head back to northern Gaza as the ceasefire between Israel and Hamas continues to hold. We give you the latest. Also in the programme: as the world remembers the liberation of Auschwitz 80 years on, we discuss how survivor testimonies shape our political future. Plus, we debate the future of working habits as 200 UK companies sign up for a permanent four-day working week and Paris’s evolving noise-pollution problem.