Insurance comparison site GoCompare has called a review of its GBP40m media-buying account, "Campaign" reveals. Carat is the incumbent.

A group of fourteen shopping comparison sites have complained to the EU that Google is still not complying with its commitment to play fair in search, the BBC writes. The complainants claim that the auction-based system to appear in the shopping box is meaningless as Google subsidises its own bids. Google denies any wrongdoing.

London Mayor Sadiq Khan has vowed that all "junk food" ads will be banned from all tube stations and bus stops in the capital from next year, "The Independent" writes.

Parliament's Intelligence and Security Committee (ISC) has blasted the social media networks for failing to cooperate with police investigations and for hosting extremist material. "The Telegraph" reveals that the committee has gone to the lengths of advising advertisers to boycott the major platforms.

Nando's has selected Karmarama as its advertising agency, Campaign reports. The appointment came after a competitive pitch and does not affect AnalogFolk, which holds the restaurant's digital account.

Cambridge Analytica is lodging an appeal against its GBP500,000 fine for data breaches imposed by the ICO after the Facebook scandal, "Campaign" reports. The fine was the maximum available to the ICO at the time.

Facebook is vowing to bring in a system that will check the ID and nationality of anyone wishing to place a political ad in time for next May's European Parliamentary elections, "The Telegraph" writes.

Twitter has injected some humour into its latest video ad featuring John Lewis, the American tech lecturer who gets mistaken for the department store chain every Christmas, despite making it clear he is not the store. "The Guardian" reveals that he regularly gets questions about stock and opening hours and is inundated with messages when the John Lewis ad launches each Christmas.

Instagram is vowing to remove likes, follows and positive comments that it believes have been paid for. "Netimperative" reports the Facebook-owned social media site is unveiling new AI tools that can spot suspicious activity and delete it.

Coca-Cola has retained MediaCom as its media agency for a further five years, "Campaign" reveals. The account covers the company's sub-brands, including Diet Coke, Fanta, Sprite and Schweppes.