As the war in Sudan moves into its second year, 1,000 refugees a day continue to cross its southern border. Within the small town of Renk in South Sudan, a rapidly growing refugee population faces desperate shortages of water, food and shelter. For many, South Sudan marks a return to a land they thought they had left behind, having fled the country after civil war broke out in 2013. Now new fighting in their adopted country has forced them back again

• UK Foreign Office holding secret talks with Sudan’s RSF paramilitary group