Ask HN: who in Europe is expert at customer development?

I'm writing a short series on my blog (http://whiteboardmag.com) about European experts in customer development.

The idea is to make a very practical guide for founders who do realise they have to "get out of the building" but need some tools and tips to do it right.

I'm looking for European founders or experts who talk well about the subject of customer development and elicitation, and who are willing to share their experiences and insights.

Thank you for helping out!