Harrods becomes latest UK retailer to cyber attack, after M&S

The incident comes barely 48 hours after Co-op first disclosed it was experiencing a similar cyber attack that it also took proactive steps to mitigate, and less than a fortnight after M&S was forced to suspend multiple online services following an incident.

This lends weight to growing speculation that all three attacks may share a common link, originated through an unidentified third-party retail services partner in a supply chain attack.

"There must be a common thread across these retailers that has put them firmly in the crosshairs of cyber criminals. These aren’t isolated events, they are a wake-up call," said by 

Tim Grieveson, ThingsRecon.