On the morning of 1 January 2017, one of the busiest nights of the year due to new year celebrations, a system failure impacted the system for several hours. Between 00:30 and 05:15 control room staff had to fall back on pen and paper methods. Response times were further impacted by the concurrent failure of the web based tracking system and of automated satellite navigation systems for ambulance crews. This required location details to be passed by radio and then manually entered into satellite navigation systems in vehicles. The ambulance service stated that an investigation would be launched to establish the reasons for the system failure.