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Homepage. This page: Find out more about the 'YO' series of registration numbers, used in the London area.

YO series of older car registration numbers.

Registration letters >> YO series
This page lists registration number codes from the YO series, a series allocated to the London area. Also included, where known, are the date periods that these car registration numbers were used in. The data covers the period of 1900 through to 1972, so registrations seen on later cars wouldn't necessarily be included in this information.

Interpreting a car's registration number.

The majority of post-war car numbers incorporate a three letter code - where this is the case, letters 2 and 3 signify the location code. So, for instance, a car with the registration number 638 GYO or TYO 512D would be a London-issued number. A car with just two letters, ie YO, would also be from this area. Listed below are the known YO series registrations, with added information (where available) describing when each series was first used, and in a few cases, when it came to an end. Some letter codes were used for more than one period during the 20th Century. This information can be invaluable when trying to date vehicles seen in old photographs, or in old films for instance.
Also if your car has lost it's original registration, perhaps sold off by a previous owner as a "cherished" number, this information will help you find a suitable replacement, or at least identify which series would be suitable, based on the age of your car and where it was first registered.
YO Registrations - London.
Reg. Letters Year Letter Start -> End Date (if known)
AYO H DEC 1969 ->
AYO B APR 1964 ->
AYO APR 1934 ->
AYO JUL 1960 ->

BYO H APR 1970 ->
BYO B AUG 1964 ->
BYO JUN 1935 ->
BYO APR 1961 ->

CYO H AUG 1969 ->
CYO C JAN 1965 ->
CYO JUN 1936 ->
CYO SEP 1961 ->

DYO J AUG 1970 ->
DYO C MAR 1965 ->
DYO JUN 1937 ->
DYO APR 1962 ->

EYO J MAR 1971 ->
EYO C MAY 1965 ->
EYO JUN 1938 ->
EYO NOV 1962 ->

FYO J NOV 1970 ->
FYO C SEP 1965 ->
FYO AUG 1939 ->
FYO MAY 1963 ->

GYO J MAR 1971 ->
GYO C NOV 1965 ->
GYO SEP 1943 ->
GYO NOV 1963 ->

HYO K NOV 1971 ->
HYO C ->
HYO MAY 1947 ->
HYO MAY 1947 ->
HYO ___ 1965 ->

JYO K FEB 1972 ->
JYO D JAN 1966 ->
JYO JUN 1948 ->

KYO K JAN 1972 ->
KYO D JUL 1966 ->
KYO DEC 1949 ->

LYO K JUN 1972 ->
LYO D MAY 1966 ->
LYO MAR 1951 ->

MYO D SEP 1966 ->
MYO JUN 1952 ->

NYO E FEB 1967 ->
NYO AUG 1953 ->

OYO F SEP 1967 ->
OYO MAY 1954 ->

PYO F DEC 1967 ->
PYO MAR 1955 ->

RYO L APR 1973 ->
RYO E MAY 1967 ->
RYO SEP 1955 ->

SYO F SEP 1967 ->
SYO MAY 1956 ->

TYO M AUG 1973 ->
TYO F FEB 1968 ->
TYO MAY 1957 ->

UYO F MAR 1968 ->
UYO JAN 1958 ->

VYO G DEC 1968 ->
VYO NOV 1958 ->

WYO H OCT 1969 ->
WYO MAY 1959 ->

XYO G MAY 1969 ->
XYO OCT 1959 ->

YO APR 1926 -> JUN 1926

YYO H JAN 1970 ->
YYO MAR 1960 ->
Return to the main vehicle registrations page.

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