MGA's delivered to Oxford City police:
855CFC - 36850 - Black/red/red hood
856CFC - 36849 - Black/red/red hood
The second two letters on the number plate determine the place of first registration. The other letter and the numbers are sequential and unique to each car. There was no way to identify the year of first registration until 1963 when the "A" suffix was introduced in some areas.