As noted, London intends to act through the Organization for the Prohibition of Chemical Weapons (OPCW), urging it to put pressure on Moscow.
British officials are also set to discuss possible anti-Russian sanctions with allies in Europe, including France and Germany, in the coming weeks.
According to Bloomberg, the United States plans to introduce a second, larger package of restrictions on Russia, if Moscow does not abandon the use of chemical weapons and does not allow inspections of facilities where they are supposed to be located.
The agency also clarified that various options are being considered from restrictive measures against Russian businessmen to sanctions related to Russia's sovereign debt.
Earlier, the US State Department called on Russia to abandon chemical weapons in order to avoid a second round of sanctions due to the situation with Alexei Navalny.