..... at that time DVLA were selling their 'Cherished' numbers only for 'A' registrations, and then each year when the 'new' prefix came out, for a limited set of numbers (1-20,30,40,50,100,200,999 etc) for that particular prefix - they didn't allow people to buy any plates other than those, so if you didn't get your plate by 31st July, you couldn't buy it.
That has now changed, and all are now availlable (unless sold!).
As such, this plate would have been in the DVLA 'Cherished Numbers', and *could* have been on since new (if the original owner purchased it), or bought since they filled up the back catalogue and placed on the car.
It certainly wouldn't just be there by good luck - the bloody government gets money wherever it can!!!!
Oh, and it was a fair few years previous to then that they stopped issueing single digit numbers on plates (when 'A' prefix came out) - as that's when they realised that there was cash to be made from vain motorists (like me

