We've gone all out for solubility! This week, Steve visits Jem Challender of Prufrock Coffee for a face-to-face chat about Prufrock's "test roast solubility quality control protocol", which has sparked much conversation and debate about how science and sensory sit together in coffee.

In addition to tackling some difficult questions about where responsibility lies (with baristas? with roasters?), Steve and Jem also discuss the early days of Monmouth, the Prufrock basement piano, and Prufrock's seedy beginnings alongside a shop specialising in "dignified erotica."