Russian diplomacy is no longer about co-operation but "putting Westerners in their place", say ex-Kremlin insiders.

Russia’s diplomats were once a key part of President Putin’s foreign policy strategy. But that has all changed.

In the years leading up to Russia’s full-scale invasion of Ukraine, diplomats lost their authority, their role reduced to echoing the Kremlin’s aggressive rhetoric.

BBC Russian asks former diplomats, as well as ex-Kremlin and White House insiders, how Russian diplomacy broke down.