But, at the last minute, the Information Commissioner's Office (ICO), which is tasked with enforcing the changes, announced that firms have a year to sort their sites out before it will take any action.
Information Commissioner Christopher Graham said on Wednesday that the organisation would take this approach, but that it is not an example that companies should blindly follow, explaining that the ICO will use examples from other sites to shape its guidance.
"Every web site is different, and prescriptive and universal 'to do' lists would only hinder rather than help businesses to find a solution that works best for them and their customers," he said.
"The initial advice that we issued earlier this month will continue to be supplemented with real-life examples as they come in."
ICO home page asking users' permission to store cookies on their computers.
The ghost is still in the machine
Campaigners want US authorities to break-up Instagram, WhatsApp and Messenger into separate companies
The perception of the industry as "a white man in a hard hat" is limiting new applicants, says Hayaatun Sillem
Almost two years late - and just as AMD is readying 7nm Zen 2 for early 2019