ajor security alert at Westminster after at least one person shot after police officer attacked outside House of Commons The aftermath of the apparent knife attack, which seemingly saw the attacker shot by police, could be seen in Old Palace Yard, the courtyard directly outside parliament. At least one person could be seen prone on the ground, tended do by ambulance staff. An air ambulance landed on the grass of Parliament Square, and medical crews rushed in. However, they soon stepped back, and there was no sign of anyone being taken away. While police looked clam, dozens of armed officers...