London Ambulance Service reverted to pen and paper yesterday after a system crash which was caused by a hardware fault.
Scores of paramedics complained on internet message boards about yesterday's fault.
The Evening Standard today reported on the ambulance service crash and followed up an article on ComputerWeekly.com and the IT Projects blog about the troubled go-live of the Cerner Millennium LC1 system at the Royal Free Hampstead NHS Trust.
A spokesman for the London Ambulance Service said that there were "technical problems in our control room and work was undertaken to resolve this issue".
He added, "We identified the cause to be an isolated hardware issue. The faulty part was replaced and the system has been restored. During the intervening period we reverted to the tried and tested process of recording details of emergency calls on paper and then passing information to ambulance crews and rapid responders over the radio system".