A 50-metre cordon is in place and hundreds of people have been evacuated from nearby buildings, the London Fire Brigade has said.... Staff in offices and shops in the immediate vicinity were asked to vacate. These evacuations were carried out as a precautionary measure. Emergency services are at the scene and are managing the incident. The square is currently closed to pedestrians. Police have asked the public to avoid the area. Two fire engines and around 10 firefighters from Soho and Euston w