Writers including Zadie Smith, Ian McEwan and Russell T Davies have put their names to an open letter – signed by more than 400 authors and organisations – calling for an immediate ceasefire in Gaza

The letter, also signed by Jeanette Winterson, Irvine Welsh, Kate Mosse and Elif Shafak, describes Israel's military campaign in the territory as "genocidal".

The writers urge people to join them in "ending our collective silence and inaction in the face of horror".