The Metropolitan Police has launched a massive operation with drones, dogs, horses and helicopters as thousands of people are expected to gather in London for Tommy Robinson 's Unite the Kingdom march and the pro-Palestine Nakba Day rally . Some 4,000 police officers will be on the streets as the force hopes to ensure both demonstrations go smoothly. It all comes on the same day as the FA Cup final between Chelsea and Manchester City at Wembley. The Unite the Kingdom protest will start on