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The driver who ploughed into football fans during Liverpool's trophy parade 'tailgated' an ambulance to access the 'closed' road where the horror smash unfolded.Police are today facing major questions over how the people carrier accessed Water Street, a packed road in the city centre, before it rammed into a huge crowd at around 6pm on Bank Holiday Monday, leaving 47 injured.A total of 27 people have been taken to hospital following the horrific incident, including four children. One child was trapped under the car with three adults when firefighters arrived to save them. Liverpool City Metro Mayor Steve Rotheram said the 'big question' was how the Ford Galaxy was able to plough into the crowd, adding: 'Water Street was not a route where vehicles were supposed to be using it, it was blocked off.'