England & Wales Port Registrations
AB: Aberystwyth
BD: Bideford
BE: Barnstaple
BH: Blyth
BK: Berwick-on-Tweed
BL: Bristol
BM: Brixham
BN: Boston
BR: Bridgwater
BS: Beaumaris
BW: Barrow
CA: Cardigan
CF: Cardiff
CH: Chester
CK: Colchester
CL: Carlisle
CO: Caernarvon
CS: Cowes
DH: Dartmouth
DR: Dover
E: Exeter
F: Faversham
FD: Fleetwood
FE: Folkestone
FH: Falmouth
FY: Fowey
GE: Goole
GR: Gloucester
GY: Grimsby
H: Hull
HH: Harwich
HL: Hartlepool
IH: Ipswich
LA: Llanelly
LI: Littlehampton
LL: Liverpool
LN: King’s Lynn
LO: London
LR: Lancaster
LT: Lowestoft
M: Milford Haven
MH: Middlesbrough
MN: Maldon
MR: Manchester
MT: Maryport
NE: Newcastle
NN: Newhaven
NT: Newport, Gwent
P: Portsmouth
PE: Poole
PH: Plymouth
PN: Preston
PT: Port Talbot
PW: Padstow
PZ: Penzance
R: Ramsgate
RN: Runcorn
RR: Rochester
RX: Rye
SA: Swansea
SC: Scilly
SD: Sunderland
SE: Salcombe
SH: Scarborough
SM: Shoreham
SN: Shields, North
SS: St. Ives
SSS: Shields, South
ST: Stockton
SU: Southampton
TH: Teignmouth
TO: Truro
WA: Whitehaven
WH: Weymouth
WI: Wisbech
WO: Workington
WY: Whitby
YH: Great Yarmouth

Scottish Port Registrations
A: Aberdeen
AA: Alloa
AD: Ardrossan
AH: Arbroath
AR: Ayr
BA: Ballantrae
BC: Buckie
BF: Banff
BO: Borrowstoness
BRD: Broadford
BU: Burntisland
CN: Campbeltown
CY: Castlebay, Barra
DE: Dundee
DS: Dumfries
FR: Fraserburgh
GH: Grangemouth
GK: Greenock
GN: Granton
GW: Glasgow
IE: Irvine
INS: Inverness
K: Kirkwall
KY: Kirkcaldy
LH: Leith
LK: Lerwick
ME: Montrose
ME: Methil
OB: Oban
PD: Peterhead
RO: Rothesay
SR: Stranraer
TN: Troon
TT: Tarbert, Loch Fyne
SY: Stornoway
UL: Ullapool
WK: Wick
WN: Wigtown

Northern Ireland Port Registrations
B: Belfast
CE: Coleraine
LY: Londonderry
N: Newry