That depends. Who is he and why should we care?
He's a fairly well-known British astronomer. He's written a number of books and had a chapter about the Flat Earth Society in "Do You Speak Venusian?". That particular chapter is in PDF here if you want to give it a read.
I've just read and enjoyed it. I'd just like to quote one bit of it, the last sentence in fact:
Those who believe the world to be shaped like a pancake are among the most attractive of the really Independent Thinkers.
They don't come across on this forum as very attractive people. That's a personal opinion and not aimed at you Daniel but some of your colleagues. You actually seem quite a nice bloke.