President Vladimir Putin said he'd sought an "open dialogue" with the West.
Almost a year after Russian President Vladimir Putin launched a full-scale invasion of neighboring Ukraine, the two countries are engaged in a struggle for control of areas throughout the east and south.
Putin's forces pulled out of key positions in November, retreating from Kherson as Ukrainian troops led a counteroffensive targeting the southern port city. Russian drones have continued bombarding civilian targets throughout Ukraine, knocking out critical power infrastructure as winter sets in.
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Following his meeting in the U.K., Ukrainian President Volodymyr Zelenskyy will meet with French President Emmanuel Macron and the Chancellor of the Federal Republic of Germany Olaf Scholz in Paris on Wednesday, Macron's office said.
President Volodymyr Zelenskyy on Wednesday spoke to Parliament in London, thanking members for their support against the "evil" aggression of the Russian invasion Ukraine.
He thanked Britain for training troops "who will be then deployed to the front line -- front line -- skilled, eager and equipped to win."
Ukrainian President Volodymyr Zelenskyy is expected to meet with U.K. Prime Minister Rishi Sunak in London on Wednesday.
He's also expected to address Parliament, "as the UK steps up its delivery of lethal aid into the country, and prepares to train fighter jet pilots and marines," the prime minister's office said in a statement.
"President Zelenskyy's visit to the UK is a testament to his country's courage, determination and fight, and a testament to the unbreakable friendship between our two countries," Sunak said in a statement.
-ABC News' Joe Simonetti and Guy Davies
The Russian death toll has reached its highest number in a 24-hour period since the invasion of Ukraine began, according to Ukrainian military officials.
At least 1,030 Russian soldiers died overnight into Tuesday, according to the Armed Forces of Ukraine. About 1,900 soldiers died in a two-day period after 25 Russian tanks were destroyed, Ukrainian military officials said.
-ABC News' Will Gretsky
