Lloyd said his group, to which 20,000 people had signed up to, would seek permission to appeal the decision.
“Today’s judgment is extremely disappointing and effectively leaves millions of people without any practical way to seek redress and compensation when their personal data has been misused,” he said in a statement.
“Google’s business model is based on using personal data to target adverts to consumers and they must ask permission before using this data. The court accepted that people did not give permission in this case, yet slammed the door shut on holding Google to account.”
A Google spokeswoman said: “The privacy and security of our users is extremely important to us. This claim is without merit, and we’re pleased the court has dismissed it.”
Google remains under pressure from lawmakers and regulators over its privacy practices in the United States, where it has acknowledged making mistakes in the past.
In 2012, it agreed to pay a then-record civil penalty of $22.5 million to settle Federal Trade Commission charges that it misrepresented to Apple Safari internet browser users that it would not place tracking ‘cookies’ or serve them targeted ads.