A coroner said the delay by the ambulance service in giving care to Norfolk baby Bella Hellings was "wholly indefensible".
William Armstrong concluded the three-month-old died as a result of congenital heart disease after delays in medical assistance reduced her chances of survival.
He said: "We are told that at the time the ambulance service was experiencing significant demand and there were apparently insufficient resources to meet that demand.
"Twenty-six minutes is a very, very long period of time indeed.
"The delay in giving Bella the care that she needed was wholly indefensible. There was a catalogue of catastrophes and a chaotic response."
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A chilly evening but cloud thickening with outbreaks of rain spreading from the west after midnight. Lows of 2 deg C (36 deg F).
Crews are working against the clock this weekend to repair damaged bridges over the A47 in King's Lynn.
Hybrid Air Vehicles said the aircraft has now been stabilised and made completely safe to work on.