Channel 4 has signed up O2 and Vauxhall as the first partners of new ad product ‘Ad Journey’. The new format, developed in partnership with Innovid, uses All 4 viewer data to serve them different ads based on ones they have previously viewed or interacted with. Furthermore, brands can serve All 4 viewers differing creative based on whether users are existing customers. O2 is using the platform to engage All 4 users with the ‘Make Them Giants’ campaign to to get behind the England rugby team.