World leaders and experts are considering whether Russia is likely to use a nuclear weapon or whether it’s a bluff or a tactic to get the West to back down from its support for Ukraine. But they agree the threat should be treated seriously, with both NATO and the US warning Russia that it would face severe consequences if it conducted any nuclear strikes.

Mia Jankowicz is a news reporter at Insider’s London office (where this first appeared). She previously covered Brexit for The New European and has contributed stories to The Guardian, The New Statesman,, and, as well as several local newspapers.