We are currently aware that some customers are unable to access their accounts. We are currently investigating this and will update this post with more information when we have it. Apologies for the inconvenience.
Update: 18:56 CET – This issue has now been resolved. We will update this post when we know more about the cause.
Update: 21:32 CET – The problem was caused by a network issue on one of the physical host servers. This has now been resolved.