This is the BBC.

I'm just back from Berlin,

where I've been talking to German

businessmen and politicians about Brexit.

And whilst there, I stood by what remains of the Berlin Wall,

I stood on top of it, on the day it fell.

And I learnt to my amazement,

the Wall has now been down for longer than it was up.

The big question I think now, the question this week,

is whether it's the attitudes that shaped my childhood,

the attitudes of the Cold War, which will continue to shape politics.

Or is it the attitude of the post-Eraque War generation

that will make the difference?

My guest on the podcast is Joe Swinson,

deputy leader of the Liberal Democrats, who's elected back then

after the Iraq War, and no doubt because of Liberal Democrat opposition to it.

She tells me, though, she became interested in politics.

Very young, for rather different reasons.

I think if I look back, I have always wanted to change the world.

I remember when I was about eight years old,

going into the body shop, which in the 1980s,

that was the thing you would go in and you would get a little wicker basket,

...