British Prime Minister David Cameron is making his case to lawmakers for the UK staying in the European Union.
Britain will hold a referendum on its membership of the bloc in June - after Mr Cameron won a package of reforms to the UK's relationship with Brussels.
However, the Prime Minister faces opposition from some key figures within his own party, who will campaign for a so-called BREXIT.
Britain's pound has slumped on currency markets against the US dollar after London Mayor Boris Johnson announced he would side with those who want the UK to leave the EU.
Olly Barratt is outside the Houses of Parliament.
IN: "David Cameron's…
OUT: …minds."
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