The Yantar intelligence ship was seen operating drones in an area containing critical energy infrastructure

A Russian spy ship has been escorted out of the Irish sea after it entered Irish-controlled waters and patrolled an area containing critical energy and internet submarine pipelines and cables.

It was spotted on Thursday east of Dublin and south-west of the Isle of Man but Norwegian, US, French and British navy and air defence services initially observed it accompanying a Russian warship, the Admiral Golovko, through the English channel last weekend.