Russian state TV appears to have urged the Kremlin to blow "boorish Britain" to smithereens over the country's support for Ukraine.
Pro-Putin TV anchor Vladimir Solovyov floated the idea of using Vladimir Putin's 16,000mph "Satan-2" nuke.
The shocking RS-28 Sarmat missile is capable of flying more than 11,000 miles while carrying 15 warheads.
If used, the projectile has the capability of obliterating the UK in a single strike.
Mr Solovyov said to his viewers: "As it turned out, one Sarmat means minus one Great Britain."
A Sarmat intercontinental missile is tested by Russian military.
RUSSIAN DEFENCE MINISTRY
Vladimir Putin is reported to be increasingly frustrated by Britain's support for Ukraine.
Reuters
The TV host slammed Britain's involvement in the conflict, saying the country has got "totally boorish," live on the Kremlin-backed channel.
Russia has already issued warnings to Britain over their continued support for Ukraine, threatening a "proportionate response" should it continue its "direct provocation".
Russia's defence ministry cited statements from Britain's armed forces minister James Heappey who told BBC radio that it was entirely legitimate for Ukraine to hunt targets in the depths of Russia to disrupt logistics and supply lines.
"We would like to underline that London's direct provocation of the Kiev regime into such actions, if such actions are carried out, will immediately lead to ourproportionalresponse," Russia's defence ministry said.
"As we have warned, the Russian Armed Forces are in round-the-clock readiness to launch retaliatory strikes with high-precision long-range weapons at decision-making centers in Kyiv."
The defence ministry also said that if such Russian strikes were made it would not necessarily be a problem if representatives of a certain Western country were located at Ukraine's decision making centres.
Britain's Heappey said it was completely legitimate for Ukraine to strike Russian logistics lines and fuel supplies and he acknowledged the weapons the international community was now providing had the range to be used in Russia.