Thanks for this Alkistis. Lean research isn’t just for when you don’t have access to a user researcher. As a user researcher myself, I’ll generally try to use the leanest approach I can to get the insights the team needs.

I personally advise colleagues here against the guerilla testing approach. It sounds easy to set up in a cafe and get people to take a look at your designs. But it’s actually a lot easier to recruit target users for sites like Kayak and Skyscanner. The cafe thing ends up being more trouble than it’s worth.