Police in London prepared for renewed demonstrations as tensions over the war in Gaza continue to rise across the United Kingdom. Protesters are marching through central London to demand the immediate release of hostages held in Gaza, with family members of captives joining the rally near the prime minister's residence. The demonstration follows a day of mass arrests, when hundreds were detained for supporting a banned pro-Palestinian group. The ban, enacted after activists targeted military and defense sites, is being legally challenged by supporters who argue the government's response is excessive. Organizers of the march emphasize the humanitarian nature of their demand, calling for the unconditional release of all hostages, regardless of political views.