I produced a dossier detailing Hibbs' activities while I was working there, but a lot of it covered fakes that had already passed through Catawiki unnoticed, so it didn't go down particularly well, politically!
That Newark siege piece was one of the first to alert me that there was something fishy going on - he attempted to submit it (or an identical one) for auction in April 2016. It didn't get past me, but many of his coins had been approved before I started there. Sadly, I'm not surprised that he's at it again. Although he has registered under a different name, many of the coins he is selling are, like the Newark, identical. The Edward the Elder penny in the recent Catawiki auction was rejected by me in May 2016.