(Illustration Photo: Reuters)

These sanctions, first introduced in 2014 in response to Russian actions destabilizing the situation in Ukraine, have been significantly expanded since February.

The UK Foreign Office said on its website that the sanctions, which include travel bans and asset freezes, were imposed on 42 new people and entities, including several governors of Russian regions and the Kremlin-installed prime minister of the separatist-controlled Donetsk region of Ukraine, Vitaly Khotsenko.

The UK has imposed sanctions on a number of Russian billionaires and politicians, including President Vladimir Putin. It has sanctioned more than 1,100 people and more than 100 businesses.