Spotify have launched its podcast advertising service across the UK, which will allow advertisers to purchase pre-roll, mid-roll or post-roll ad placements. The offering will allow placements within episodes of podcast shows on a title-by-title basis, advertisers will also be able to partner with select podcast hosts on campaigns. This comes a little over a year since the streaming service announced its proprietary ad technology. The Streaming Ad Insertion technology will deliver and report on confirmed ad impressions as opposed to downloads, as well as reach and frequency. Learn more about it here.