Watch the full interview with the Prime Minister from tonight's programme.
Mr Cameron confirmed that Wales will host the 2014 Nato Summit, an event that he described as "a great moment for Wales to advertise its modern and economically brilliant face to the world".
He also said that an announcement on devolved powers for Wales will be made on Friday.
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Kenyans Eliud Kipchoge and Vivian Cheruiyot won the men's and women's races respectively, in a scorching hot London Marathon.
Most areas will have a dry night with some clear spells.
The collision took place on the A525 Denbigh bypass at around 11pm and involved a blue Porche Cayman.