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A series break occurs when a change in the methodology used to measure and report audience data produces a significant change to the audience data itself. This is typically as a result of improvements in measurement techniques that allow more accurate and comprehensive collection and computation of the data.

Audience reports up to September 2018 use Nielsen Digital Panel (NDP) audience figures. From October 2018, TRW began the integration of Nielsen’s improved, IAB accredited Digital Content Ratings (DCR) data which permits the capture of digital audiences previously unreported (off-platform, secure pages, video and mobile under 18 years old).

As the digital methodology has changed, there will be a trend break in the data, rendering year-on-year comparisons of both digital audiences and total audiences for news media and magazines invalid. The trend break will last until October 2019. Month-on-month comparisons may be made from the November 2018 database onwards. Print remains unaffected.

Data Release Dates Data Release Dates
Data Period Public Release Date
Apr 17 – Mar 18 4 June, 2018
May 17 – Apr 18 2 July, 2018
Jun 17 – May 18 7 August, 2018
Jul 17 – Jun 18 3 September, 2018
Aug 17 – Jul 18 2 October, 2018
Sep 17 – Aug 18 29 October, 2018
Oct 17 – Sep 18 3 December, 2018
Nov 17 – Oct 18 21 January, 2019
Dec 17 – Nov 18 18 February, 2019
Jan 18 – Dec 18 4 March, 2019
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