Council for Education Policy Research and Improvement July 11, 2002.
Top 20 outdoor advertisers, Feb ‘14 - Jan ‘15 Total Year Expenditure: £1bn. Source: NMR and Outdoor Media Centre.
Top 20 outdoor advertisers, Nov’ 2012 – Oct’ 2013 Total Year Expenditure: £970.1m Source: NMR and Outdoor Media Centre.
