British Foreign Secretary Liz Truss will visit Poland on Monday to call for tougher action to tackle Russian aggression and to support Ukraine in peace talks, her office said in a statement.
"(Russian President Vladimir) Putin is yet to show he is serious about diplomacy. A tough approach from the UK and our allies is vital to strengthen Ukraine's hand in negotiations," Truss said.
Britain has coordinated with international allies to impose sanctions on key Russian industries and Moscow's wealthy elites with the aim of crippling its economy in response to the Russian invasion of Ukraine.
The British government has argued that sanctions need to go further.
(Reporting by Muvija M; editing by William James and Michael Holden)
