We are aware that BT currently have network problems, meaning some people cannot access certain sites or email servers. It’s a BT issue which is outside our control so we don’t know how long it will take them to resolve. BT’s own status and portal web sites are down, so there is not much information available regarding the fault.
Swift Internet NOC 
Update: It has been reported that a BT spokesperson said: “We’re sorry that some BT and Plusnet customers are experiencing problems accessing some internet services this morning. This is due to power issues at one of our internet peering partners’ sites in London. Engineers are working to fix things as fast as possible.”
The BT Issue is now reported on the BBC web site: http://www.bbc.co.uk/news/technology-36844712