which defines the government's foreign, defence, security and international development policies. In June 2021, a confrontation occurred between and the Russian Armed Forces in the 2021 Black Sea incident. Russian invasion of Ukraine In response to the Russian invasion of Ukraine in February 2022 the UK government applied economic sanctions on Russian banks and individual citizens and banned Aeroflot aeroplanes from entering British airspace, in retaliation the Russian government banned British aeroplanes from entering Russian airspace. Britain also supplied the Ukrainians with military equipment; most notably sending NLAW missiles to Ukraine, commencing in January 2022 in anticipation of the Russian invasion. As of 16 March 2022, the UK confirmed that it had delivered more than 4,000 NLAWs to Ukraine. In addition the UK commenced supplying Ukraine with Starstreak missiles (HVM) to help prevent Russian air supremacy. British soldiers were sent via Poland to help train Ukrainian forces. These were sent as an interim measure until the arrival of the Sky Sabre missile defence system. On 26 February 2022, Britain and its partners took "decisive action" to block Russia's banks' access to the SWIFT international payment system, according to British Prime Minister Boris Johnson. On 5 March 2022, Britain warned that Russia's suggested ceasefire in Mariupol, Ukraine, was most likely a ploy to distract international attention while reorganizing its forces in preparation for a fresh onslaught. "By accusing Ukraine of breaking the agreement, Russia is likely seeking to shift responsibility for current and future civilian casualties in the city," stated the British defence ministry in an intelligence briefing. Britain also urged its citizens to consider fleeing the country. "If your presence in Russia is not essential, we strongly advise that you consider leaving by remaining commercial routes," announced the British government in a statement. On 11 March 2022, the United Kingdom imposed sanctions on 386 members of Russia's lower house of parliament and announced that it will attempt to prohibit the export of luxury products to Russia in order to raise diplomatic pressure on Russian President Vladimir Putin over the invasion of Ukraine. On 12 March 2022, France, the United Kingdom, and Germany cautioned Russia that its demands for economic guarantees with Iran could jeopardize an almost-completed nuclear deal. On 17 March 2022, the United Kingdom said it had "very, very strong evidence" of war crimes in Ukraine, and that Russian President Vladimir Putin was orchestrating them. On 24 March 2022,