Sony Announce The PSN Has Scheduled Maintenance Today From 4PM GMT/ 8AM PT And Last For Four Hours

Sony have announced the PSN will be down for Maintenance today. this will last for 12 hours and start from 4 PM GMT/ 8AM PT. the store and account management will be not be available but you will be able to access online play and apps is you are already signed in by the time of the maintenance.

Source: USA Playstation Blog