19:08 - This has now been resolved.
Mar 31, 19:06 BST
All connectivity has been resumed and we are monitoring the situation, we apologise for any inconvience caused.
Mar 31, 14:38 BST
We have also been made aware that this is also affecting websites / connectivity to webservers with certain Internet service providers.
Mar 31, 11:02 BST
We have been made aware of email connectivity issues with some customers across our mail platform, we are currently investigating links between this and problems with certain Internet service providers.
We apologise for any inconvience caused.
Mar 31, 10:51 BST