LONDON, Nov 1 — British police yesterday arrested at least 139 Palestine Action supporters, who protested in London and Edinburgh days ahead of a court appeal over the government’s contentious ban of the group.London’s Metropolitan Police began detaining people shortly after hundreds started a lunchtime “mass action” outside the US Embassy, an AFP reporter witnessed.The force said in an evening update that officers were “continuing to make arrests” as they confirmed that 139 had already been detained.Police have arrested more than 4,000 people on suspicion of showing support for Palestine Action, according to campaigners, after the British government outlawed it...