Figures are sourced from audience measurement body Rajar.
(D) Digital-only stations
(Q) Based on quarterly survey period
(H) Based on six-monthly survey period
The three main reasons an ad is not viewable is if it disappears too quickly, appears below the page fold, or too little of it can be seen, according to Meetrics, the European ad verification company.
WPP's Group M has upgraded its forecasts for advertising revenue growth in UK to 7 per cent in both 2015 and 2016 as "bullish" adspend strongly outpaces economic growth.
Cinema ad revenues are set to smash expectations by jumping almost 23 per cent in the UK this year.