The Foreign Office has just released a statement after Russia expelled six British diplomats on accusations of spying.
"The accusations made today by the FSB against our staff are completely baseless," a spokesman said.
"The Russian authorities revoked the diplomatic accreditation of six UK diplomats in Russia last month, following action taken by the UK government in response to Russian state directed activity across Europe and in the UK.
"We are unapologetic about protecting our national interests."
https://news.sky.com/story/ukraine-war-russia-news-putin-nuclear-live-updates-kyiv-12541713
