The photography is by Rory Lindsay. After a few attempts at illustrating and working with typography on the top of the photographs I felt like nothing was working, and anyhow the podcast artwork that's most noticeable at a small scale in iTunes is either graphic or illustration only.
However, it was important that the presenters' faces were in the artwork, so I worked on the contrast of the photos and turned it into a graphic, similar to the sort of thing you might use for screen printing.
I was inspired by the style of public information posters and Penguin paperback fiction books from the '60s and '70s, so worked on an idea around that.
The FInal design in the iPhone app
Designs for social media