Countdown to tragedy

1.15pm: The out-of-service double decker bus pulls off Wellington Quay after a change of drivers.

Seconds later, the bus swerves out of control and crashes on to the pavement behind the No 66 bus, which is collecting passengers.

The bus careers into people queuing and passers-by before passing the No 66 bus and stopping just in front of it. At least eight people were trapped under the bus.