That will be the Weird Ebay postings, and the Ebay Number Plate auction.
Whilst trawling through ebay to see if any disgruntled Geordie had stuck Mike Ashley on ebay, I found this tenuous link to the Toon Army.
N7 is a North London postcode - the other end of the country from Newcastle.
NFC - I'm struggling to think of a football team with the initials NFC. Newcastle United's initials are NUFC.
Yes! "N7 NFC" is ideal for a Newcastle supporter, how exactly?! And then you see the Newcastle crest in the middle of the number plate.
Right. That seems like a desperate link to NUFC! Other than that, it would just be an unremarkable number plate.
But most number plates are unremarkable, and you can make the letters at the end stand for anything. For example, "No Football Connection".
And now for a short You Tube piece about personalised number plates!

Yep, deffo got to go into the bin. Quite pathetic attempts some of them.