A R1T has been spotted in Luik (Liège) Belgium. Apparently Luik is near the headquarters of VDL Nedcar, a company that Rivian has been in talks with about a European factory.
www.electrive.com

Netherlands makes case for European Rivian factory - electrive.com
Rumours about a European plant of the US electric vehicle manufacturer Rivian have been circulating for some time. While a production plant near Bristol in England was previously considered the favourite, the Dutch Ministry of Economic Affairs has now confirmed that talks are being held with...
