These guys put NFC chips in their products like PCGS. Was going to post a 2022 Britannia thread in World/Ancient Forum but I think what really makes these gold coins neat is the MintID package. It's the same size as a standard assay card so I can store it with my bars. I'm not into grading modern bullion coins and PCGS slabs take up too much room.
Britannia does have nice legs tho... just sayin'.