1518He explains in his audio clip that his quote comes from an email sent to him and his boss by a senior client of theirs.

He says: “It came at a time when I didn’t have a lot of confidence, didn’t really believe in myself, but this feedback really meant a lot to me. It helped me regain my confidence, the email helped me get a promotion…

"I’m now going to take it on as a personal mantra, because if you know your stuff then you can speak your mind.” Taken in Regent Street, London, UK.