Using the latest RAJAR MIDAS research for Spring 2018, the IAB took a deep dive into the UK's digital audio audience.
The results revealed that:
In total, 24.8 million people in the UK listen to online audio, 45.5% of the population
People spend 12.1 hours a week on average listening to digital audio, increasing to 15.5 hours on average for 15-24 year olds
18% of people who listen to digital audio listen exclusively online. This increases to 30% of 15-24 year olds.