He does a lot of bearing- and BB-related videos on YouTube, and sells bearings. Based in the UK I believe. Claims to have mechanical engineering credentials, and seems knowledgeable. To be fair anyone can seem credible to a layman depending on how good of a salesman they are, but I don't pick up any of that from his videos.

I recently ordered some NTN-brand radial bearings from him and he was responsive and the product appears to be genuine. They were a bit pricey, but I got tired of replacing Enduro bearings on my wheels and BB's that seem to go gritty after a year or so, so I figured I'd give a highly-rated Japanese brand a try on one of my hubs. Haven't gotten around to it yet though.