Share 'Critical friends at work'

What is your experience of critical friendship at work?  And how can it be facilitated? Julia Goga-Cooke is running a piece on critical friends in the newsletter of IAF Middle East, Europe and North Africa, and she's asked to make a link to the short article that I'm attaching here. When the IAF piece is published, I'll make a link back to the IAF website, so that parallel and connected conversa…