You're about to listen to a BBC podcast and maybe it's when I had a hand in.

I'm Tammy Walker and I produce podcasts for the BBC.

My role is to give new and diverse creators a voice with the opportunity to build a career.

That's the thing I love about Podcast.

You start with just a good idea.

But then you have the space to see where it goes.

And doing that at the BBC means we can really run with the best stories

while developing the most unique audio talent.

So if you like what you hear, why not check out the huge range of

podcast we've got on BBC Sounds. BBC World Service and now Witness History with me Ben Henderson.

Today you'll hear the story of how one man risked his life making secret recordings

to reveal one of Spain's biggest corruption scandals.

There were lots of references to dark places and sexual favors and prostitutes,

but I think the most shocking thing was just the sheer number of confessions about gifts and huge amounts of money that were given to so many people in Spanish politics and within the rolling people's party.

This is Jose Luis Penaise, the man that exposed the girtle scandal,

Spain's corrupt system of bribes for building contracts, and its main protagonist, a businessman called Francisco Correa.

The roots of the scandal lay in Spain's economic boom in the 1990s and early 2000s. Investment was flowing into the

construction industry in the expectation the economy would keep growing.

Regulation was low. It was said you just needed to know the right people and pay them handsomely.

In 2001, Kosele Louis, then a counselor for the ruling People's Party,

was preparing for the happiest day of his life.

I work for the mayor of the city.

...