A1 and 1A are both local to me and as previously stated on a Mini Cooper R53. Brother of Sultan of Brunei. Paid £1m for one of them I believe!
Saw A4 last weekend on a regular small hatch!
As a teenager I wanted GUY 1, which was on a series 1 Jag in Itchenor. Old boy called Arthur - go figure! Sold for £7k 20 years or so ago. Probably 6 figure value now!
One of my sons called today to inform me of this, currently at auction; https://collectingcars.com/plates/612-fer-number-plate
612 FER
Currently on a Blue Roller according to dvla