"We see you." That was UK Defence Secretary John Healey’s defiant warning to Russia's President Vladimir Putin after his spy ship was spotted in UK waters this week. The ship, known as Yantar, is operated by a Russian Ministry of Defence agency and officially carries out oceanographic research.

"Yantar," a Russian spy ship, has entered the Kattegat Strait, which divides two NATO countries, Denmark and Sweden. There are suspicions that the vessel is collecting data on critical infrastructure located in this area.

The British defense secretary told Parliament that the Yantar, which he described as a Russian spy ship, had come near Britain’s coast for the second time in a few months.