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It's introduced by Kate Aide.

Hello, today a touch of theatre as the biggest summit of David Cameron's career moves

to centre stage.

There's a guided tour of an American jail where there's no natural light, not much exercise, and no contact between officers and inmates.

How Portugal's been affected by years of emigration.

It's lost, the brightest and its best educated, and perhaps its future too.

And we're in the Bogoyne region of France for a crash course in cloggy culture.

It's not just wooden footwear, you know, It's the stuff of sinister and bloody legend.

So for Britain, it's the most important European summit meeting in a generation,

and it begins in Brussels in a few hours time.

The Prime Minister hopes a deal on the UK's relationship with the rest of Europe will be finalised,

allowing him to call a referendum on Britain's EU membership as early as June.

Katya Adler, who's in Brussels, says many expect the Prime Minister will get his deal,

but the negotiations aren't over yet.

I'll admit it's rare, really rare that EU headquarters in Brussels,

this grey monosuted town within a town feels animated and alive, but it does at the moment. Brexit, the possibility

of the UK leaving the EU, has everyone talking in myriad of different European languages, and the prospect at today's summit of a showdown between

David Cameron and other EU leaders has sent a buzz of excitement shivering down the echoy halls

of EU institution buildings.

Basking in the great drama of it all, Donald Tusk, the president of the European Council,

...