SWTOR down for 7 hours tomorrow (3 April) for maintenance

Star Wars: The Old Republic will be down for scheduled maintenance for seven hours tomorrow (3 April) from 8am BST/3am EST.
Despite being scheduled for seven hours, a post of the BioWare forums from their SWTOR community managers states that the maintenance is expected to take “no more than five hours”.
No specifics on what the maintenance is in regards to, other that the usual “general improvements and to check performance of the game”. However, as seasoned players will know, many of these maintenance downtimes are followed by a new patch.
Source: SWTOR.com