Person A is sat in car in ambulance bay outside hospital main entrance. Person B comes out main entrance holding hands with 2 children and walks behind car to cross the road. Small one-way road no cars coming. Person A reverses and almost hits one of the children but Person B pulls them back. Person A apologises but Person B doesn't respond but body language suggests they're not happy. Person A then changes to shouting at Person B for not using the crossing further down (the other way to where Person B was going) and drives away. Who is wrong? Should Person A have looked before reversing or should Person B have only crossed at the crossing?