The first dateless registration system
By 1932, registrations in the first Dateless system of number plates were beginning to run out so a new system had to be introduced. This consisted of three letters followed by, up to three numbers, taken from the series tripleA 1 to YYY 999. In this system the regional tags were the second and third letters in the set of three. The single letter tags were now dropped as prefixing them would have created duplicates of previous two-letter tags. The letters I and Z were not used on mainland Britain as they were reserved for use in Irish registrations. The current Northern Irish system is similar to this dateless system but uses 4 numbers instead of 3. Q registration was only used for imports at this point.
