This field contains a code which identifies the Regional Office (RO) in which the purchaser is located. It is derived from the purcode field.

The current codes include those used in 1995-96 and those used subsequently. There were alterations to the codes from April 1996 and April 1999 to reflect changes in the regional organisation.

From 1999-2000 to 2001-2002:
S or S0000 = Scotland
W or W0000 = Wales
Y01 = Northern and Yorkshire
Y02 = Trent
Y07 = West Midlands
Y08 = North West
Y09 = Eastern
Y10 = London
Y11 = South East
Y12 = South West
Z or Z0000 = Northern Ireland
null = Not known

From 1996-97 to 1998-99:
S or S0000 = Scotland
W or W0000 = Wales
Y01 = Northern and Yorkshire
Y02 = Trent
Y03 = Anglia and Oxford
Y04 = North Thames
Y05 = South Thames
Y06 = South and West
Y07 = West Midlands
Y08 = North West
Z or Z0000 = Northern Ireland
null = Not known
9999 = Not known

1995-96:
A0000 = Northern
B0000 = Yorkshire
C0000 = Trent
D0000 = East Anglia
E0000 = North West Thames
F0000 = North East Thames
G0000 = South East Thames
H0000 = South West Thames
J0000 = Wessex
K0000 = South Western
M0000 = West Midlands
N0000 = Mersey
P0000 = North Western
Z or Z0000 = Northern Ireland
null = Not known
9999 = Not known