Foreign Secretary William Hague and his German counterpart have held talks aimed at pushing for financial support for Ukraine as the constitutional crisis in the country deepened.
Mr Hague discussed the fast-moving situation with Frank-Walter Steinmeier and the pair agreed their support for a "new government" in the country, as President Viktor Yanukovych described the events as a coup and insisted he would not step down.
Mr Yanukovych left the capital Kiev and travelled to his political powerbase in the country's east, while Ukraine's parliament has voted to call early presidential elections for May 25.
Mr Hague wrote on Twitter: "Agreed with German Foreign Minister Steinmeier today to support new government in #Ukraine and push for vital IMF financial package."
The vacated presidential palace in Kiev quickly became a draw for protesters and journalists, who used social media to share photographs of the opulent building and its private zoo.
Under an agreement reached yesterday between Mr Yanukovych and leaders of the opposition protests, early elections were to be held no later than December.
But the possibility that he could remain in office for the rest of the year angered protesters who want his immediate departure.
A Foreign Office spokeswoman said Mr Hague's tweet about a "new government" referred to the changes agreed yesterday and "working towards a new constitution and elections".
She said the discussions with Mr Steinmeier were a follow-up to the developments yesterday.
"Obviously there is still a lot more to be done there now," the spokeswoman said.
"One of the things they talked about was the economic situation and putting together a financial package which will help to stabilise the situation in Ukraine, to enable the Ukraine to receive long-term support from the IMF."