Key facts- ✓ The UK has used compulsory registration plates since 1903
- ✓ The current 7-character format was introduced in September 2001
- ✓ Suffix plates ran from 1963–1982; prefix plates ran from 1983–2001
- ✓ Northern Ireland uses a separate system with no age identifier
- ✓ The current system is designed to last until 2051
- ✓ Digital plates remain illegal in the UK as of 2026
The History: How We Got from 1903 to Today
The Motor Car Act 1903 introduced compulsory vehicle registration in the UK, and from 1st January 1904 every motor vehicle had to display a registration plate. The original format was simple: a one- or two-letter local authority code followed by a sequential number (e.g., A 1 for London). As vehicle numbers grew, the format evolved to accommodate demand.
By the early 1960s the original system was reaching saturation in many areas. In 1963, the DVLA (then operating through local authorities) introduced the suffix system — a trailing letter that changed each year to indicate the year of registration. This ran from A in 1963 through to Y in 1982 (with some letters skipped for clarity).
In 1983 the format reversed: the year letter moved to the front (the prefix), running from A in 1983 to Y in 2001. Prefix plates are still widely traded as personalised registrations today. The final prefix letter, Y, was issued through February 2001 before the current system took over in September 2001.
At New Reg, established in 1991 and online since 1996, we have traded plates across all of these formats and understand the nuances of each generation.
Decoding the Current UK Number Plate Format
Since September 2001, UK number plates have followed a standardised seven-character format: two letters, two numbers, followed by three letters (AB12 CDE). Each element serves a specific purpose.
Regional Memory Tags
The first two letters indicate where the vehicle was initially registered. These area codes cover specific DVLA offices across Britain. Key examples:
- London: LA–LY designations cover various London DVLA centres
- Birmingham: BA–BY represent West Midlands registration
- Manchester: MA–MY indicate Greater Manchester origins
- Edinburgh: SA–SJ cover Scottish capital registrations
- Cardiff: CA–CY represent Welsh registrations
Age Identifier Numbers
The two-digit number reveals the vehicle's registration period. The system operates on a six-monthly cycle:
- March to August: Uses the year number (e.g., 25 for 2025)
- September to February: Adds 50 to the year (e.g., 75 for September 2025 to February 2026)
Random Letters
The final three letters are assigned randomly, ensuring each registration remains unique. I, Q, and Z are excluded from this section to prevent confusion with numbers.
Decoding a Number Plate Step by Step (Worked Example)
Let's decode a real-world plate: LK73 XBF
- L — First letter of the area code: L = London DVLA region
- K — Second letter: K = Wimbledon DVLA local office
- 73 — Age identifier: 73 is between 51 and 99, so it's a September release. 73 − 50 = 23, meaning the year is 2023. Registered September 2023 to February 2024.
- XBF — Random letters assigned by DVLA computers. No special meaning.
Conclusion: this is a London-registered vehicle first put on the road between September 2023 and February 2024.
Now let's decode MA25 YJT:
- M — Manchester DVLA region
- A — Manchester local office
- 25 — Between 01 and 50, so March release. Year = 2025. Registered March to August 2025.
- YJT — Random letters.
Formats You'll Encounter on Used Cars: Suffix, Prefix, Current
When buying on the used market, you're likely to encounter three distinct plate formats depending on how old the vehicle is.
Current format (2001–present): AB12 CDE structure as described above. Any car registered from September 2001 onwards will carry this format unless a private plate has been applied.
Prefix format (1983–2001): A single year letter at the front, followed by up to three numbers, then a space, and two or three letters (e.g., R123 ABC). The year letter tells you the registration year. These are the most common format for personalised plates in the £500–£5,000 market today.
Suffix format (1963–1982): Three letters, up to three numbers, then the year letter at the end (e.g., ABC 123A). Older suffix plates in good condition can be valuable. See our dateless plates section for pre-suffix-era formats.
Suffix Year Letters (1963–1982)
| Letter | Period |
Letter | Period |
| A | January–December 1963 | L | August 1972–July 1973 |
| B | January–December 1964 | M | August 1973–July 1974 |
| C | January–December 1965 | N | August 1974–July 1975 |
| D | January–December 1966 | P | August 1975–July 1976 |
| E | January–December 1967 | R | August 1976–July 1977 |
| F | August 1967–July 1968 | S | August 1977–July 1978 |
| G | August 1968–July 1969 | T | August 1978–July 1979 |
| H | August 1969–July 1970 | V | August 1979–July 1980 |
| J | August 1970–July 1971 | W | August 1980–July 1981 |
| K | August 1971–July 1972 | X | August 1981–July 1982 |
| | | Y | August 1982–July 1983 |
Prefix Year Letters (1983–2001)
| Letter | Period |
Letter | Period |
| A | August 1983–July 1984 | L | August 1993–July 1994 |
| B | August 1984–July 1985 | M | August 1994–July 1995 |
| C | August 1985–July 1986 | N | August 1995–July 1996 |
| D | August 1986–July 1987 | P | August 1996–July 1997 |
| E | August 1987–July 1988 | R | August 1997–July 1998 |
| F | August 1988–July 1989 | S | August 1998–February 1999 |
| G | August 1989–July 1990 | T | March 1999–August 1999 |
| H | August 1990–July 1991 | V | September 1999–February 2000 |
| J | August 1991–July 1992 | W | March 2000–August 2000 |
| K | August 1992–July 1993 | X | September 2000–February 2001 |
| | | Y | March 2001–August 2001 |
DVLA Number Plate Standards and Legal Requirements
The DVLA maintains strict standards ensuring number plates remain legible and compliant with British regulations. All UK number plates must use the mandatory Charles Wright font and follow precise spacing — 11mm gaps between letters, 33mm between the age identifier and final letters. Front plates are white reflective with black characters; rear plates are yellow reflective with black characters.
All plates must meet BS AU 145e standards. Non-compliance can result in MOT failure and fines of up to £1,000. For a full breakdown of the rules, see our guide to number plate rules and illegal number plates in the UK.
Private Number Plate Considerations
When selecting personalised registrations, understanding DVLA restrictions helps avoid disappointment. Private plates cannot make vehicles appear newer than their actual age — a 2020 vehicle cannot display a 2024 age identifier. Moving private registrations between vehicles requires proper documentation; our V317 form guide explains the transfer process step by step.
For those thinking about number plates as an investment, see our guide to number plates as an investment. And if you're looking to sell a plate you own, our sell my number plate page provides a free valuation.
