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Over the last few months, I've been looking through the evidence and the documents.

And when you line them up, it became clear to me that there were a number of occasions where I could have potentially prevented this happening.

Missing opportunities to prevent a tower block fire which killed 72 people. That's a serious admission.

It's that of a relatively junior civil servant, Brian Martin.

Gray suit, glasses, Brian Martin could be a bit forgettable.

You probably haven't heard of him.

But in the story of Grenfell Tower, he matters.

He advised ministers on the bit of the building regulation guidance which covered fire safety, essentially

setting out what was allowed and what wasn't.

The public inquiry into the Grenfell Tower fire has shown Brian Martin was warned numerous

times that flammable materials were being installed on high-rise buildings across the country. He's accepted some responsibility for the government's lack of action.

I ended up being the single point of failure in the department.

But Brian Martin's evidence to the inquiry doesn't just tell us about one man.

It tells us how ministers and civil servants operated at a time

when, as he says, regulation was a dirty word.

This is going to be the first government in modern history that at the end of its parliamentary term has less regulation in place than there was at the beginning.

This is the story of a fire which killed 72 people,

a fire both foreseeable and preventable,

and what it tells us about the people and policies meant to protect us.

I'm Kate Lamble from BBC Radio 4.

This is Grenfell, building a disaster.

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