Tens of thousands of people have taken part in a mass protest in central London to call for a permanent ceasefire in Gaza. An estimated 45,000 protesters marched from Park Lane to Whitehall on Saturday carrying banners and placards, as police handed out leaflets that provided them with "absolute clarity" over what would land them in a cell. A total of 18 people were arrested. Follow live: Israel-Gaza latest Metropolitan Police said those arrested included four people who were handing out literature that featured a swastika inside a Star of David. Another man was arrested on suspicion of inciting racial...