The UK's GCHQ head says the UK and allies have a "narrowing window" to counter cyber threats from China and Russia, as Russia intensifies "daily" hybrid warfare (Chloe Taylor/CNBC)

Chloe Taylor / CNBC: The UK's GCHQ head says the UK and allies have a “narrowing window” to counter cyber threats from China and Russia, as Russia intensifies “daily” hybrid warfare — Choose CNBC as your preferred source on Google and never miss a moment from the most trusted name in business news.