Why does some big successful brands go bust?

Toast is back for a new series, taking a look at the decisions that often left investors burnt.

I'm Sean Farrington, a BBC business journalist. I'll be hearing about the hype.

They're going to do the deal that makes them the most money at that point of time.

And I'm picking what went wrong, talking to owners and employees to ask, what can we learn?

It was being undercut by similar rivals. It just couldn't survive.

Toast. Listen first on BBC Sounds.

Welcome to TechLife on the BBC World Service, the programme about technology making an impact on all our lives.

I'm Zoe Kleinman. This week we hear from Inside China on the remarkably fast electric vehicle transition going on there,

as the country moves away from petrol and diesel-powered cars and lorries and EV production sores.

That's in a moment.

Who has the fastest computer in the world and what's it used for?

An expert tells us everything we need to know about supercomputers.

And I'll be finding out about a new piece of tech that can provide electricity,

transport and clean drinking water in disaster zones, all using solar power. Do you live in a part of the world where electric vehicles are an increasingly common site on the roads?

I've certainly noticed that here in Scotland.

According to the International Energy Agency, sales of electric cars or EVs

exceeded 17 million globally last year, reaching a sales share of 20%. But in China, electric cars

accounted for almost half of all car sales in 2024. One in 10 cars on Chinese roads is now electric.

And China is the powerhouse of EV manufacturing,

responsible for more than 70% of worldwide production.

The BBC's transport correspondent Nick Marsh visited China

...