This discussion paper provides an overview of the TV advertising sector in the UK, focusing on current trends and future outlooks. It outlines the significant transformations in the UK advertising landscape over the last two decades, particularly due to the rise of online platforms, which have altered both TV viewing habits and advertising models. The paper details how TV advertising remains a crucial revenue source for commercial Public Service Broadcasters (PSBs), despite a decline in linear broadcasting advertising revenues. It discusses the shift in advertisers' strategies, who now view TV advertising as part of a broader audio-visual (AV) campaign rather than in isolation. The document also highlights the challenges faced by PSBs in adapting to these changes and diversifying their revenue sources. Furthermore, it examines the implications of subscription video on-demand (SVoD) services entering the advertising space and the growing significance of platforms like YouTube in the AV advertising landscape. Overall, the paper aims to inform stakeholders about the dynamics of the TV advertising sector and its impact on PSBs.