«Brexit» y política de seguridad y defensaposibles efectos en las relaciones UE-UK.

Resum

The defence and security policy has become a stronger player in a context of a European Union that has loose power at global level. Demographic decline, migration crisis, new emergent economies and its potential role in the global economy, together with differentiated integration and internal conflicts, new global threats and the Brexit, have made of European security and defence policy one of the drivers of the future European Union Strategy. Brexit implies the first exit of a member in the EU after decades of successive enlargements. This Eurosceptic partner —relevant in the economic or financial field— may become crucial in the field of defence because of its high contribution to defence European budget and its nuclear military power. The aim of this work is to show a view of the different perspectives in the field of security, defence policy focusing in defence after Brexit, and analyse possible scenarios with its implications to the European Union at different levels.