Britain banned the use of pounds sterling in Russia as part of new sanctions

The British government has announced this. 

The message refers to a ban on the export or use of pounds sterling or denominated EU banknotes in Russia.

Also under the ban is “providing, supplying or delivering such banknotes to a person associated with Russia.” 

In addition, the admission of such banknotes to circulation in Russia is prohibited.

Earlier, British Foreign Secretary Liz Truss said that the UK would impose new anti-Russian sanctions until Russia withdraws its troops from Ukraine.