British Defence Secretary John Healey told parliament Wednesday the Royal Navy was tracking a "Russian spy ship" that passed through UK waters, warning Russia' "We know what you're doing". "I also wanted President Putin to hear this message: 'We see you, we know what you're doing and we will not shy away from robust action to protect this country'," he told MPs. The ship entered British waters on Monday about 45 miles (72 kilometres) off the country's coast, with the Royal Navy dispatching two vessels to monitor it, Healy said.