Around the UK, a hidden crisis has been growing over the past eight years.

Since the Grenfell Tower fire in 2017, something extraordinary has become clear about many of Britain's high-rise residential buildings. They are nothing like as safe as we had imagined.

In fact, the latest statistics show that more than 5,000 high-rise buildings have faults so serious they pose a risk to life. Clearing this up has quietly become one of the biggest infrastructure challenges of our generation, with a bill totalling £16.6 billion and rising, and a project which could continue for the next 20 years.

Author and housing journalist Peter Apps investigates the building safety crisis through the story of one building which has many of the problems afflicting places across the country.

What is the reality for people living there? Why was it built like this? And with the government's promise of 1.5 million new homes over the next five years, do we risk making the same mistakes again?

Presenter: Peter Apps

A Reduced Listening production for Radio 4