iCloud woes - no documents syncing and can't access iWork documents online

Hi,

Up until a couple of days ago iCloud document syncing was working fine, but now everything has gone haywire! All of my documents are showing a dotted cloud symbol next to them, which means that they are unable to sync, and also I am unable to access my iCloud documents online, i.e. on icloud.com. I can access all my other iCloud pages, i.e. Mail, Notes, Calendar, etc, but not Numbers, Pages or Keynote. When I try to do this I am redirected to the iCloud login pages.

I am wondering if anyone has any suggestions as to what I can do to try to get this working again.

Thanks,

Nick