Around midnight the patient was having trouble breathing and had chest pains. The daughter set off her mother's medical alarm and was put through to a call-taker who called 111.
The ambulance officer - "Mr E" - accompanied by the volunteer, checked the woman, spoke to the local hospital and left.
Around two hours later, at 4am, the daughter called the ambulance again.
The paramedic recognised the woman was now seriously unwell and made arrangements to take her to hospital. He and the daughter got her into a wheeled chair but it tipped over before being righted and then the woman collapsed and fell to the ground.
Once she was loaded into the ambulance, the paramedic put her on oxygen and monitoring machines. During the trip, on which the daughter was present, alarms sounded because the woman's oxygen level was low.
The deputy commissioner said: "Mrs B stated that she was yelling at Mr E that the red light was flashing and there was a question mark alert but, 'He just kept going and didn't even stop - we were flying'.
"Mrs B said it felt as thought they went sideways over a bridge ... "
"Mr E said that going sideways was not an option, as the entrance to the bridge has a right-angled corner and a give way sign, and that ambulance drivers are extremely aware of the corner and the bridge crossing because it is narrow and often used by trucks."
"The ambulance service stated that the trip to the hospital is 19.5km, and the travel time at normal road speed was approximately 19 minutes, but the journey took nine minutes."
This equates to an average speed of 130km/h.
Ms Baker said that when the woman collapsed, the paramedic failed to assess her sufficiently, he took no action when the alarms sounded and it was of concern he did not try to resuscitate her on arrival at hospital. Overall, his treatment of her was inadequate.
Ms Baker also criticised the ambulance service - unnamed in her report - over communications failures and she recommended extra training for its staff.
The St John ambulance service's medical director, Dr Tony Smith, said it is "required to respect the confidentiality" of Ms Baker's report.
"However we can say that St John takes the findings of all HDC reports very seriously and strives for continuous improvements to the service we deliver. We wish to assure the public that we take patient safety, wellbeing and privacy and confidentiality extremely seriously."