Calculating radio's share
In order to measure Commercial Radio's growth relative to other media, we calculate its share of total advertising revenue. This is based on Commercial Radio's direct competitive set i.e. the display advertising marketplace.
The display advertising marketplace includes the following:
Radio – including Sponsorship & Promotions
Newspapers/Magazines/Colour Supplements ‐
excluding classified advertising
Outdoor & Transport Cinema
(included from Q1 2003 onwards)
Display only, excludes search & classified (included from Q1 2004 onwards)
Radio figures are collated by the RAB via Ofcom. Figures for all other media are taken from the Advertising Association's Quarterly Survey of Advertising Expenditure, as published by WARC.