unaffected

They might also have taken these offline to stop the hackers from spreading their malicious software into those previously unaffected areas.

Online grocer Ocado, which sells M&S food on its platform, is unaffected by the problems as it runs on an entirely separate system.

However, both sufferers and partners agreed "love" and "commitment" remained unaffected, with strong and consistent responses in these areas from people living with the condition and their companions.

A spokesperson for Cardiff University said it will do everything it can to minimise the impact, and the university will remain open with some areas of teaching, research and services unaffected.

"I can reassure residents that our routine services will remain unaffected and our teams will continue to deliver the high standards people rightly expect."