Sony have announced that on January 15th the Playstation Network will be offline for maintenance.
The network will be offline for 4 hours from 9am PST/12pm EST/5pm GMT. Features that will be unavailable during this period are as follows:
- PlayStation Network Account Registration.
- PlayStation Network Account Management.
- Entertainment services.
- PlayStation Store on all devices.
You also will not be able to sign into PSN through any of the Playstation websites.
Online play will also be unavailable during this period, however you should still be able to play online if you have signed into your SEN account though a relevant device before the scheduled maintenance is due to begin.
battlemisfit.com 
Thanks for the heads up! So that’s 5pm in the UK?
Sure is! Make sure you sign in before this time if you want to continue your online gameplay!