Freed Ukraine opposition leader Yulia Tymoshenko told anti-government protesters in an emotional speech, "You have no right to leave the Maidan [Independence Square] ... Don't stop yet."
More top news
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.