Three NATO ships and a submarine, in cooperation with maritime patrol aircraft, E-3 airborne early warning aircraft and numerous associated ships and submarines, conducted a focused security patrol in the central and western Mediterranean Sea this month.
Estonia and the United Kingdom both spend 2.13% of their GDP on defence.
British police are investigating three improvised bombs sent to London.
The Electronic Warfare Advisory Committee met in Brussels.
NATO and the former Soviet republic are now cooperating very closely.
An MoD official has outlined the proposed terms for the UK's participation in EU defence agencies and bodies.
The Polish Air Force is preparing to return to Siauliai Air Base, Lithuania, to lead the NATO Baltic Air Policing mission from January 2019 onwards.
"It's a real disaster for the Navy, it’s the first time in history that there will not be any submarine operating for months," warns the president of the Foreign Affairs Committee of the German Parliament, Hans-Peter Bartels, in an interview published on Sunday in the Berlin weekly Bild am Sonntag.
NATO Secretary General Jens Stoltenberg stressed the importance of strong transatlantic cooperation and institutions at the World Economic Forum in Davos, Switzerland on Thursday.
BAE Systems say it will develop advanced analytics technology to assist in the detection of weapons of mass destruction threat activity.