<div class="at-above-post addthis_tool" data-url="https://www.retailgazette.co.uk/blog/2026/06/tesco-waitrose-join-dunnhumby-retail-media-pilot/"></div>Tesco, B&Q, John Lewis and Waitrose are taking part in a series of pilots for a new dunnhumby retail media alliance designed to make it easier for brands to run campaigns across multiple retailers. The dunnhumby network alliance has been launched to tackle fragmentation across retail media, one of the sector’s biggest barriers to scale....<!-- AddThis Advanced Settings above via filter on wp_trim_excerpt --><!-- AddThis Advanced Settings below via filter on wp_trim_excerpt --><!-- AddThis Advanced Settings generic via filter on wp_trim_excerpt --><!-- AddThis Share Buttons above via filter on wp_trim_excerpt --><!-- AddThis Share Buttons below via filter on wp_trim_excerpt --><div class="at-below-post addthis_tool" data-url="https://www.retailgazette.co.uk/blog/2026/06/tesco-waitrose-join-dunnhumby-retail-media-pilot/"></div><!-- AddThis Share Buttons generic via filter on wp_trim_excerpt -->