Editors: Hass Azzoug, Sarjit Bains

The blaze broke out in the 850-year-old cathedral’s medieval roof on April 15 last year, causing the 295ft spire to collapse through its stone-vaulted ceiling. President Emmanuel Macron to pledged that Notre Dame would be back up and running within an ambitious deadline of five years.

Edited by Hass Azzoug and Sarjit Bains, this documentary follows the efforts to rebuild the world-famous Cathedral of Notre Dame de Paris a year on from the devastating fire. Chief architect Philippe Villeneuve urgently needs a complete picture of the damage sustained during the fire, so he initiates an unprecedented collaboration between architects and scientists. Their mission is to meticulously analyse the fallen timber, stone and fractured glass, to develop a decontamination and restoration plan. This unique opportunity offers a new insight into the medieval materials, techniques and people who built Notre Dame.

Wednesday 15^th April  9pm BBC Four