British Service Number Prefixes

A – ASC (Old Special Reserve).

A – KRRC (Early wartime recruits).

A – RSF, Cameronians & AOC.

B – 26/RF (City of London Bankers).

B – KRRC, Rifle Brigade & Cameronians.

C – KRRC (16th Battalion onwards).

C – 1/R Munster Fus. (Garrison Bn.), Middx. Regt. & Rifle Brigade.

CHT – Corps of Horse Transport – ASC.

CMT – Corps of Motor Transport – ASC.

D – Dragoons & Dragoon Guards.

DG – Dragoon Guards.

DM – Driver MT – ASC.

E – 17/RF (Empire Battalion).

F – 17 & 23/Middx. Regt. (Football Battalions).

G – 1, 2 & 3/RIF (Garrison Battalions).

G – Prefix found on various Home Counties regiments (Service Battalions).

GS – See above.

GS – Cavalry regiments (War service only).

GS – General Service.

H – Hussars.

J – 38, 39 & 40/RF (Jewish Battalions).

K – Royal Lancaster Regt. (The King’s Own) & Cambridgeshire Regt.

L – Lancers.

L – Prefix found on various Home Counties regiments (Regulars).

L – 3/SWB.

M1 – MT Section – ASC.

M2 – Electricians – ASC.

MS – Mechanical Specials (trade) – ASC.

MT – Mechanical Transport (trade) – ASC.

N – RAMC.

O – Rifle Brigade.

P – Military Police.

P – Dragoon Guards.

PS – 18, 19, 20 & 21/RF and 16/Middx. Regt. (Public School Battalions).

PW – 18, 19 & 26/Middx. Regt. (Public Works Battalions – later Labour Corps).

R – Remount Section – ASC.

R – KRRC (later recruits up to 16th Bn.), also Manchester Regiment.

RX – Remount Section – ASC.

S – Supply – ASC.

S – Highland Regiments (wartime enlistments).

S – Home counties regiments (3rd [Militia] Battalions).

S – Rifle Brigade, Dorset Regt., R Munster Fus., AOC, RA & RAMC.

SB – 10/RF (City of London Stockbrokers Battalion).

SD – 11, 12 & 13/R Sussex Regt. (South Downs Battalions).

SE – Army Veterinary Corps (Special Enlistment for duration).

SPTS – 23 & 24/RF (Sportsmans’ Battalions).

SS – Supply Special (trade) – ASC

STK – 10/RF (City of London Stockbrokers Battalion).

T1, T2, T3 & T4 – Horse Transport – ASC.

T – Army Ordnance Corps.

T – Territorial Force.

TF – Territorial Force.

TS – Transport Specials (trade) – ASC.

TSR – Transport Special Reserve – ASC.

W – 13/Cheshire Regt. (Wirral).

W – 38th (Welsh) Divn. Royal Artillery.

WR – Royal Engineers (Waterways & Railways).

Y – KRRC (early wartime enlistments).

Z – Rifle Brigade.

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