So you sat there doing all this financial modeling and I love doing stuff like that by the way.

I actually love sitting there and working out.

Is everything going to be okay?

It is so rewarding when you get to that point where the business has finally turned around.

Sage empowers finance professionals like Kat to feel more rewarded

with helpful business tools and advice from real experts.

Sage helping business flow.

My guest this week has been there and done that.

He joined Williams as an engineer when the team had a staff of just 23 people

and over the following four decades he worked with some of the greatest teams,

the quickest drivers and on some of the fastest cars the sport has ever seen.

Changing the whole car was never sensible actually.

The most important thing over the winter was to make sure what he did change

was the thing that was going to make it quicker, not just something that you fancy changing.

The idea of never spending a penny on something that doesn't matter is still strong in me.

Although Frank Dernie retired from Formula One more than ten years ago,

his influence lives on.

He was a man who loved finding solutions, who could spot the things that the data didn't show.

And he knew how to get the best out of racing drivers.

I didn't think any driver was that much quicker than one of the others, frankly.

I knew that one driver was better than the other in the team because you saw consistently one of them was quicker.

But I thought that pretty well any driver would be able to win in the fastest car.

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