Three former Supreme Court justices have warned Prime Minister Rishi Sunak that the UK is breaching international law by continuing to arm Israel.   They are among over 600 lawyers and academics who are signatories of a 17-page letter, which also urges ministers to work towards a ceasefire in Gaza and resume funding to the UNRWA aid agency. It comes as civil servants overseeing arms exports could stop work over fears they may be complicit in war crimes.  On the Sky News Daily, Tom Cheshire asks Michael Mansfield KC, head of chambers at Nexus Chambers and former judge on the Russell Tribunal on Palestine, about why he has signed the letter.   Plus, our political correspondent Rob Powell details the current government's arms dealing with Israel and the response to calls to stop supplying weapons.  Senior producer: Annie Joyce Interviews producer: Melissa Tutesigensi-CharlesEditor: Philly Beaumont