The Kremlin has warned Boris Johnson that it has a “surprise” in store for those who have the “impudence” to compare Russia with Nazi Germany.

In a veiled warning to the Foreign Secretary, Maria Zakharova, a spokesman for the Russian foreign ministry, claimed that the UK is using the Salisbury attack as part of a “black PR” campaign to turn the West against Russia.

Describing Mr Johnson’s comparisons between Adolf Hitler and Vladimir Putin as a “colossal provocation,” Ms Zakharova told Russian reporters that there would be repercussions for Britain.

“We have a surprise for all who have the impudence to compare, to draw parallels between Russia and the Third Reich,” she added.

" Let's wait until Thursday, I promise to unveil a historic gift at a press conference. The gift is for Boris Johnson and everyone. "