A man has died and an 11-year-old child is in a life-threatening condition in hospital after several vehicles crashed in south-east London.The Metropolitan Police said officers were called by paramedics at 8.05am on Monday to Broad Walk, in Kidbrooke.They rushed to reports of a "number" of people having been injured following the collision involving multiple vehicles and a building.London Fire Brigade said it appeared a lorry had collided with two cars and crashed into a house - which has caused