Ofcom's 2021 TMT report, which was released recently, has some interesting data points on the sector in the UK.
A lot of the 2020 trends seem to be reversing to back to their long term trends with some above trend growth. However, ad budgets have increasingly shifted to online in even larger proportions.
It also mentioned adults now spending 4 hours on average online daily. Ads follow your eyeballs.
Full report here: