The UK on Friday announced sanctions against the daughters of Russian President Vladimir Putin and Foreign Minister Sergey Lavrov, targeting what it said were the "lavish lifestyles" of the Kremlin's inner circle.
Mr Putin's daughters, Katerina Tikhonova and Maria Putina, will have their assets frozen and be banned from travelling to Britain, mirroring moves against them by the US government on Wednesday.
The same measures will apply to Yekaterina Vinokurova, the daughter of Mr Lavrov. Polina Kovaleva, a woman described by ministers as his stepdaughter, was hit by sanctions last month.
Britain said it had worked on the sanctions with the US, which said it was sanctioning the family members because Mr Putin and other oligarchs are suspected of using relatives to hide their wealth.
"Our unprecedented package of sanctions is hitting the elite and their families, while degrading the Russian economy on a scale Russia hasn’t seen since the fall of the Soviet Union," said Foreign Secretary Liz Truss.
It is the second set of British sanctions on Russia this week in response to the invasion of Ukraine and reports of atrocities committed by Moscow's troops in areas that were under their control.
Asset freezes have been imposed on Sberbank, Russia’s largest bank, and the Credit Bank of Moscow.
All new outward investment to Russia has been banned and the UK has also committed to end all imports of Russian coal and oil by the end of the year, with gas to follow as soon as possible.
Imports of Russian iron and steel products will be banned and a further eight oligarchs have been added to the sanctions list.
Which oligarchs are included in the latest list of UK sanctions?
Katerina Tikhonova and Maria Vorontsova, also known as Maria Putina, the daughters of President Vladimir Putin.
Yakaterina Vinokurova, the daughter of Foreign Minister Sergey Lavrov.
Viatcheslav Kantor, the largest shareholder of fertiliser company Acron, which has vital strategic significance for the Russian government.
Andrey Guryev, a known close associate of Mr Putin and founder of PhosAgro — another company with vital strategic significance that produces fertilisers.
Sergey Kogogin, director of Kamaz, which manufactures lorries and buses, including for the Russian military.
Sergey Sergeyevich Ivanov, president of the world’s largest diamond producer Alrosa, which the UK also sanctioned.
Leonid Mikhelson, founder and chief executive of leading Russian natural gas producer Novatek, with a net worth of £18 billion ($23.6bn).
Andrey Akimov, chief executive of Russia’s third largest bank Gazprombank.
Aleksander Dyukov, chief executive of Russia’s third largest and majority state-owned oil producer GazpromNeft.
Boris Borisovich Rotenberg, son of the co-owner of Russia’s largest gas pipeline producer SGM. The Rotenberg family are known for their close connections to Mr Putin and a number of them have already been sanctioned.
What else has been announced?
Asset freezes have been imposed on Sberbank and Credit Bank of Moscow. Sberbank is Russia’s largest bank and this freeze is being taken in co-ordination with the US.
The country also announced an outright ban on all new outward investment to Russia. In 2020 UK investment in Russia was worth over £11bn.
The UK wants to end all dependency on Russian coal and oil by the end of the year, and end imports of gas as soon as possible thereafter. From next week, the export of key oil refining equipment and catalysts will also be banned, degrading Russia’s ability to produce and export oil.
The UK is targeting Russian strategic industries and state-owned enterprises. This includes a ban on imports of iron and steel products, a key source of revenue.
Which oligarchs have been previously sanctioned?
Roman Abramovich, 55. The Russian-Israeli made his fortune in the post-Soviet years and was close to former Russian president Boris Yeltsin.
Oleg Deripaska, 54. The industrialist is worth £2 billion and has had close links with the British political establishment. He has a multimillion pound property portfolio in the UK.
Igor Sechin, 61. Officials described Mr Sechin as Russian President Vladimir Putin's “right-hand man” and the second most important person in the country.
Andrey Kostin, 65. The chairman of VTB, a Russian state-owned bank. Mr Kostin is also a member of the supreme council of the United Russia political party and deemed a “close associate” of Mr Putin who has “long supported” the Kremlin.
Alexei Miller, 60. The chief executive of energy company Gazprom, Russia's largest company and the world' biggest public energy supplier.
Nikolai Tokarev, 71. The president of the Russia state-owned pipeline company Transneft. Mr Tokarev is a former KGB officer who served alongside Mr Putin in East Germany towards the end of the Cold War.
Dmitri Lebedev, 53. The businessman and financier serves as chairman of the Board of Directors of Bank Rossiya, a Russian joint stock bank.
Kirill Shamalov, 39. He is Russia's youngest billionaire and the former husband of Mr Putin's daughter Katerina Tikhonova.
Pyotr Fradkov, 43. He is head of the sanctioned Promsvyazbank, which finances Russian defence industries, and the son of Mikhail Fradkov, a former prime minister of Russia who was chief of its foreign intelligence service.
Denis Bortnikov, 47. The deputy president of government-affiliated VTB bank. His father, Alexander Bortnikov, is head of the Federal Security Service.
Yury Slyusar, 47. The director of United Aircraft Corporation, one of the major defence organisations that has also been sanctioned.
Elena Georgieva, 45. The chairwoman of the board of Novikombank, a state-owned defence conglomerate that finances Rostec.