LONDON — All of the deaths in London’s horrific 2017 Grenfell Tower fire could have been prevented, and yet “decades of failure” by government and “systematic dishonesty” in the private sector contributed to the astonishingly high death toll, a scathing final report said Wednesday.

       The inferno at a 24-story public housing complex killed 72 people, making it the deadliest fire on British soil since World War II.