In short
- A current GB registration has a two-letter memory tag, a two-digit age identifier, and three random letters.
- March identifiers use the year, while September identifiers use the year plus fifty.
- Identify an older or personalised registration format before trying to read a date from it.
A current GB registration has a two-letter memory tag, a two-digit age identifier and three random letters. The decoder below separates those parts and says when a registration does not match the current format.
What does a UK number plate mean?
A current GB plate has three parts. Two letters identify the DVLA memory-tag region, two numbers identify the six-month issue period, and the last three letters are random. GM26 SNP therefore points to the Garden of England region and March to August 2026. SNP does not encode another fact.
The format was introduced for new GB registrations on 1 September 2001. Personalised, dateless, Northern Irish and older registrations can follow different patterns, so do not force every plate into the current decoder.
The definitions and identifier tables come from the official DVLA INF104 leaflet. DVLA calls the last three letters random and no longer describes current allocations by local office.
Where the first two letters come from
The first pair is called the DVLA memory tag. It identifies the region where the vehicle was first registered. Use the full two-letter table in INF104 when an exact allocation matters.
It does not tell you where the vehicle was built, bought or kept later. A registration can stay with a vehicle after it moves to another part of the country.
| First letter | Region | What it establishes |
|---|---|---|
| L | London | Region of first registration |
| S | Scotland | Region of first registration |
| Y | Yorkshire | Region of first registration |
| C | Cymru | Region of first registration |
| W | West of England | Region of first registration |
The standard memory-tag table does not allocate I, J, Q, T, U, X or Z as its first letter. A registration beginning with one of them needs to be identified before it is decoded as a current plate.
How the two numbers work
Two plates come out a year. The March plate carries the year itself, so a car registered in April 2026 wears 26. The September plate carries the year plus fifty, so a car registered in October 2026 wears 76.
That is the entire rule, and once you know it you cannot stop reading plates in car parks. The 50 is not arbitrary either. It was chosen so the two halves of the year could never collide, and it holds until 2050, at which point somebody else can worry about it.
| Identifier | First registered |
|---|---|
| 25 | March to August 2025 |
| 75 | September 2025 to February 2026 |
| 26 | March to August 2026 |
| 76 | September 2026 to February 2027 |
One thing worth knowing if you are buying: the identifier is the date of first registration, not the date of manufacture. A car built in December can be registered in March and carry the March identifier.
Do the last three letters mean anything?
No. DVLA describes them as three letters chosen at random. There is no age, region, dealer or vehicle code in that part.
Treat all three as part of the complete registration. They still have to be copied accurately even though they do not carry a separate meaning.
What about older plates?
Three schemes came before this one, and the decoder above handles all of them.
- Current
- AB12 CDE, since Sept 2001
- Prefix
- A123 BCD, 1983 to 2001
- Suffix
- ABC 123A, 1963 to 1983
- Dateless
- Before 1963
The prefix scheme put the year letter at the front and changed it every August, which is why so many people still talk about an R reg or a W reg. It ran out of letters in 2001. Before that, the year letter sat at the end instead.
Dateless plates are the ones that carry no age at all, and that is the point of them. A dateless registration does not display an age identifier. It can be assigned to a newer vehicle, but no registration may be used to make a vehicle appear newer than it is.
The odd one out is a Q plate. Those go on vehicles whose age genuinely cannot be established or whose identity is uncertain. Check the vehicle record rather than assuming the reason from the Q alone.
Why I spend so long on three centimetres of plate
On the prints I draw, the plate is about three centimetres wide and it takes longer to get right than the wheels. The typeface has to be the right one, the spacing has to be the legal spacing, and the whole thing has to sit in the bumper at the angle the bumper actually is.
It matters because the registration identifies the vehicle. A matching colour with one wrong character is still not an exact portrait of that car.
If you want to see yours on one, the builder is here and it changes as you type. If your car is not in the catalogue yet, I will draw it.
Questions people actually ask
- What do the numbers on a UK number plate mean?
- They are the age identifier, and they tell you when the car was first registered. March to August carries the year itself, so 26 means 2026. September to February carries the year plus fifty, so 76 means September 2026 through to February 2027.
- What do the first two letters on a number plate mean?
- They are the DVLA memory tag and identify the region where the vehicle was first registered. L tags are allocated to London, S to Scotland and Y to Yorkshire. The tag does not tell you where the vehicle lives now.
- Do the last three letters on a number plate mean anything?
- No encoded meaning is attached to them. DVLA describes them as three letters chosen at random. Their job is to complete a unique registration, not to identify the vehicle, dealer or owner.
- How do I find out what year my car is from its plate?
- Read the two middle numbers on a current-format plate. Identifiers 02 through 50 cover March to August 2002 through 2050. Identifiers 51 through 99 cover September 2001 through February 2050 after subtracting fifty from the identifier.
Written by Jonathan in Derby. Last updated .