The WPP-owned media measurement and management arm GroupM has recently published a UK-specific report on the dynamics of advertising spending across all media in 2014-2015 years. The company predicts that this year the ad spending will show a 6.3% increase in the face of a slightly lower global figure of 4.5%. This is the fastest growth of ad market among all the researched developed economies. In terms of financial value, the ad spending will account for a total of £14.9 billion ($23.3 billion) in 2014, and £15.7 billion ($24.5 billion) in 2015.

According to the report, Internet is the media with the biggest spending of £7.150 billion, traditionally backed by the incremental growth of video, social media and mobile ads. The second biggest channel is TV with  £3.903 billion of media investment in 2014, which accounts for a steady 26% share in the total ad spending in the UK.

Print media continue to struggle with the lowest media investments. This year the segment of paper newspapers will see a 8.7% decline, while printed magazines—a 11.7% fall. However, the ad spending in digital titles will show a slight increase despite the general decline in the written media.

The full report “This Year, Next Year: U.K. Media and Marketing Forecasts” can be purchased on GroupM’s website.