Wendy Zuckerman

It's called Suit and Tie.

Soon after, Ella had another asthma attack.

Rosamund said that it started out just like a normal night.

Ella was listening to music, Skyfall by Adele.

She was kind of obsessed with that song.

Ella had a coughing fit that led to a seizure and then a heart attack.

She died in the middle of the night at 3am on February 15th, 2013.

In the UK, when someone dies of unknown causes, a coroner is called in to do the assessment.

In 2014, the coroner declared that Ella died as a combination of acute respiratory failure and severe asthma.

But still, none of this made sense to Rosamund.

And she still wanted to understand what had triggered the attacks.

What killed Ella?

The coroner's report was mostly useless to Rosamund.

Except there was this one thing.

A clue.

To push it even further, she started doing a bunch of media interviews.

People got in touch from all over the country, throwing out all kinds of ideas for what might have happened to Yaa.

And this eventually led her to Stephen Holgate, a professor at the University of Southampton who specialises in asthma and allergies.

One day in 2016, he was on the train heading home from London.

Stephen had spent his entire career researching asthma, getting to know the lungs inside and out.