We join a Ukrainian mother and her son as they prepare to leave Lisbon, where they went to flee the war two and a half months ago. Subscribe to The Guardian on YouTube ► http://bit.ly/subscribegdn Despite ongoing conflict with Russian forces in the south and east of the country, the UN Refugee Agency has reported more than 4.4m* border crossings back into Ukraine since 28 February. Many of those crossing are thought to be Ukrainians heading back to parts of the country now considered relatively safe, hoping to reunite with family, rebuild their country and restart their lives. Katya and Nazar set off for Kyiv hoping to make it in time to celebrate Nazar's ninth birthday. *This figure reflects cross-border movements (and not individuals). Movements back to Ukraine may be temporary. Source: UNHCR The Guardian publishes independent journalism, made possible by supporters. Contribute to The Guardian today ► https://bit.ly/3biVfwh Sign up to the Guardian's free new daily newsletter, First Edition ► http://theguardian.com/first-edition Website ► https://www.theguardian.com Facebook ► / theguardian Twitter ► / guardian Instagram ► / guardian The Guardian on YouTube: Guardian News ► https://bit.ly/guardiannewssubs Guardian Australia ► https://bit.ly/guardianaussubs Guardian Football ► https://bit.ly/gdnfootballsubs Guardian Sport ► https://bit.ly/gdnsportsubs Guardian Live ► https://bit.ly/guardianlivesubs #Ukraine #Portugal #Russia