"Marketing Week" tackles the thorny issue of influencer marketing, asking why so many marketers are getting involved in the channel without much of an idea how to measure ROI.

Retail will drive digital ad revenues over the next couple of years, outspending the likes of automotive, consumer products, travel and financial services. "Campaign" reveals that eMarketer figures suggest retail will account for 14.2% of digital ad spend this year and mobile will account for two-thirds of that retail digital ad spend, topping the billion-pound mark this year.

Embattled taxi-hailing app Uber has poached its next chief executive from Expedia, according to the BBC. Dara Khosrowshahi will replace Travis Kalanick, who was forced to resign earlier this year after pressure from shareholders.

"The Guardian" carries a warning from a new report by OC&C Strategy Consultants, which suggests the UK's traditional broadcasters could lose a billion pounds per year to rival services from digital aggregators such as Amazon, Facebook and YouTube.

It has taken more than a year of competitive pitches, but now "Campaign" reveals that McDonald's has chosen Publicis.Sapient and Capgemini to work on its digital innovation work. Duties are expected to include a mobile ordering facility for the fast food chain.

Louise Mensch has apologised for a series of tweets alleging investigations into Donald Trump, which have proven to be made up by an "informant" who wanted to expose fake news. The well-known British writer and former MP was approached by "The Guardian" and has since apologised.

The UK Government has set out a position of ensuring data can flow freely between the country and the EU following Brexit. According to Reuters, the UK will add further details this Thursday on how the digital economy should be unaffected by the change in trading relationships.

Innocent is reworking its brand strategy to focus on health and wellness, "Marketing Week" reports.

WPP's GroupM has announced a new viewability standard of 100% of a display ad's pixels being visible for a second, Netimperative reveals. The new metric improved on the industry's standard of 50% of pixels being seen for a second. The new format is being used by the likes of Unilever, Shell, Subway and Volvo Cars.

If you are looking for a good news story about yesterday GCSE results, the BBC warns Computer Science will not prove a happy hunting ground. Just 30% of pupils who sat the exam were girls this year.