LONDON - Tens of thousands of protesters have joined two rival marches in London - the Unite the Kingdom rally organised by far-right figure Tommy Robinson, and a pro-Palestinian demonstration. More than 4,000 police officers have been deployed to the capital and are managing a so-called “sterile zone” between the two marches. Officers also used drones, police horses and dogs, and had armoured vehicles on standby. The Metropolitan Police called it one of the most significant policing operations in years, with tens of thousands of football fans also at Wembley Stadium for the FA Cup Final on Saturday afternoon. The...