A moratorium on the death penalty has been in place in Russia since 1997, but this is not the case in the two separatist territories of eastern Ukraine.
Ukrainian troops will be trained on how to use the launchers in the UK, so they can "maximise the effectiveness of the systems", Britain's defence ministry said.
McCallum said that after Al-Qaeda's plane hijackings of September 11, 2001, the threat had evolved with the so-called Islamic State group inspiring followers into extremism online.
China's broadcasting regulator has banned BBC World News, accusing it of flouting guidelines over a hard-hitting report on Beijing's treatment of the country's Uighur...