“We must not allow a prolonged and increasingly difficult conflict to unfold in Ukraine.
We must act tirelessly to ensure that Ukraine wins through military assistance and sanctions, ”TASS quoted her as saying.
Truss noted that London today cannot "take your foot off the gas pedal" in the matter of helping Kyiv.
Earlier, British Prime Minister Boris Johnson, as part of a telephone conversation with Ukrainian President Volodymyr Zelensky, spoke about the supply of anti-ship missiles and drones to Kyiv.
UK Undersecretary of Defense James Hippie said Britain could supply Brimstone missiles to Ukraine.