Russia is open to resuming nuclear tests for the first time since the Soviet era, one of Vladimir Putin’s senior ministers has said.“This is a question at hand,” Sergei Ryabkov told the Tass state news agency.

Volodymyr Zelensky’s suggestion that Ukraine could temporarily cede territory to Russia in exchange for joining Nato would mark a “major concession” to Vladimir Putin, the UK’s former ambassador to Russia has said.