Despite the consumer's confidence having been shaken since the referendum vote for Brexit in June 2016, monthly retail sales, especially online, managed to grow above the private consumption trend until this October, a turning point that could mark the start of a retail recession extending into 2019.

Since mid-2016, TV advertising and retailing have lost their historical covariance, with TV advertising's recession briefly interrupted in the first half of the year due to sunny weather and the FIFA World Cup. After a flat Q3, we predict a resumption of TV advertising's decline, expected to be down 3-4% in Q4 2018 year-on-year.

2018 will be flat for total TV advertising, still better than 2017. However, the medium's weakness will persist in the first half of 2019, with hopes for a recovery only in the second half, assuming an orderly withdrawal from the EU starts in March 2019.

Online advertising became the majority of all UK ad spend last year, in step with China but ahead of all other major markets. 

Direct response has further increased its share to 54% of UK ad spend, fuelled by the self-serve platforms of Google, Facebook and Amazon, while content media nets just 11% of the online advertising pot.

We estimate that all online-delivered channels - including "pure play" online properties, broadcaster VOD, digital out-of-home and online radio - could account for well over 60% of UK ad spend by 2020, but only with improved commitment to industry governance.