The Prime Minister asked schoolchildren in Liberia what they wanted to be when they grow up. They said doctors and lawyers, to which David Cameron joked that children in the UK want to be popstars.
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It ends a political standoff that briefly saw Yahya Jammeh and Adama Barrow claiming leadership of this tiny West African nation.
Britain is braced for sub-zero temperatures expected to bring 'harsh frost' through next week.
The historic moment was watched by 500 people in the Church in Wales who cheered after the ceremony.