UK's Cameron welcomes Ukrainian politicians in London, promises to 'stand up' for Ukrainians

Ukrainian parliamentarian Vitali Klitschko, leader of the UDAR (Ukrainian Democratic Alliance for Reform) party, arrives at 10 Downing Street for a meeting with British Prime Minister David Cameron and British Foreign Secretary William Hague, London, Wednesday, March 26, 2014. (AP Photo/Sang Tan) (The Associated Press)

Vitali Klitschko, leader of Ukraine's UDAR party, talks to members of the media after meetings with British parliamentarians in central London, Wednesday, March 26, 2014. (AP Photo/Lefteris Pitarakis) (The Associated Press)

Vitali Klitschko, leader of Ukraine's UDAR party, poses for the photographers after meetings with British parliamentarians in central London, Wednesday, March 26, 2014. (AP Photo/Lefteris Pitarakis) (The Associated Press)

British Prime Minister David Cameron has met with Ukrainian politicians and promised to stand up for their people.

Cameron on Wednesday welcomed a delegation of Ukrainian politicians, including Vitali Klitschko, to his Downing Street office in London.

He told them Britain will "stand up very strongly for the Ukrainian people to determine their own future" and will "continue to send very tough messages about the unacceptability" of Russia's recent actions in Crimea.

Cameron still said he hopes the future will involve a "strong and positive" relationship with Russia.

After the meeting, Klitschko said the talks in London had focused on efforts to stabilize Ukraine.

Draped in a Ukrainian flag, he told demonstrators demanding action against Russia that "we expect support" from Britain.