Sony Computer Entertainment Europe is currently conducting PlayStation Network maintenance.
The maintenance period will run for two hours, the company confirmed today on Twitter.

If past maintenance periods are anything to go by, online gameplay will only be available to users who have recently signed in to their PSN account and have their authentication details cached.
PlayStation Store, Account Management and PlayStation Home are expected to be unavailable during the maintenance period.
Sony announced April's batch of European PlayStation Plus content last Friday. Headlining the monthly update are Mercenary Kings for PS4 andPES 2014 for PS3. Cross Buy titles Sly Cooper: Thieves in Time andHotline Miami will also join the Instant Game Collection, as will MotoGP 13 for Vita.

http://www.computerandvideogames.com...g-maintenance/