The identifiers (second two letters) on DVLA Number Plates are letters used to pinpoint where a vehicle has been registered in Great Britain. Below shows you from which region your fizzy would have come from and in which Regional Office it was first registered. This works for all motor vehicles I believe?
Regional Identifiers - Region - DVLA Office
AA, AB, AC, AD, AE, AF, AG, AH, AJ, AK, AL, AM, AN Anglia - Peterborough
AO, AP, AR, AS, AT, AU Anglia - Norwich
AV, AW, AX, AY Anglia - Ipswich
BA, BB, BC, BD, BE, BF, BG, BH, BJ, BK, BL, BM, BN, BO, BP, BR, BS, BT, BU, BV, BW, BX, BY Birmingham - Birmingham
CA, CB, CC, CD, CE, CF, CG, CH, CJ, CK, CL, CM, CN, CO Cymru - Cardiff
CP, CR, CS, CT, CU, CV Cymru - Swansea
CW, CX, CY Cymru - Bangor
DA, DB, DC, DD, DE, DF, DG, DH, DJ, DK Deeside to Shrewsbury - Chester
DL, DM, DN, DO, DP, DR, DS, DT, DU, DV, DW, DX, DY Deeside to Shrewsbury - - Shrewsbury
EA, EB, EC, ED, EE, EF, EG, EH, EJ, EK, EL, EM, EN, EO, EP, ER, ES, ET, EU, EV, EW, EX, EY Essex - Chelmsford
FA, FB, FC, FD, FE, FF, FG, FH, FJ, FK, FL, FM, FN, FP Forest and Fens - Nottingham
FR, FS, FT, FV, FW, FX, FY Forest and Fens - Lincoln
GA, GB, GC, GD, GE, GF, GG, GH, GJ, GK, GL, GM, GN, GO Garden of England - Maidstone
GP, GR, GS, GT, GU, GV, GX, GY Garden of England - Brighton
HA, HB, HC, HD, HE, HF, HG, HH, HJ Hampshire and Dorset - Bournemouth
HK, HL, HM, HN, HO, HP, HR, HS, HT, HU, HV Hampshire and Dorset - Portsmouth
HW Hampshire and Dorset - Portsmouth (Used exclusively for the Isle of Wight)
HX, HY Hampshire and Dorset - Portsmouth
KA, KB, KC, KD, KE, KF, KG, KH, KJ, KK, KL - Luton
KM, KN, KO, KP, KR, KS, KT, KU, KV, KW, KX, KY - Northampton
LA, LB, LC, LD, LE, LF, LG, LH, LJ London - Wimbledon
LK, LL, LM, LN, LO, LP, LR, LS, LT London - Stanmore
LU, LV, LW, LX, LY London - Sidcup
MA, MB, MC, MD, ME, MF, MG, MH, MJ, MK, ML, MM, MN, MO, MP, MR, MS, MT, MU, MV, MW, MX, MY Manchester and Merseyside - Manchester
NA, NB, NC, ND, NE, NF, NG, NH, NJ, NK, NL, NM, NN, NO North - Newcastle
NP, NR, NS, NT, NU, NV, NW, NX, NY North - Stockton
OA, OB, OC, OD, OE, OF, OG, OH, OJ, OK, OL, OM, ON, OO, OP, OR, OS, OT, OU, OV, OW, OX, OY Oxford - Oxford
PA, PB, PC, PD, PE, PF, PG, PH, PJ, PK, PL, PM, PN, PO, PP, PR, PS, PT Preston - Preston
PU, PV, PW, PX, PY Preston - Carlisle
RA, RB, RC, RD, RE, RF, RG, RH, RJ, RK, RL, RM, RN, RO, RP, RR, RS, RT, RU, RV, RW, RX, RY Reading - Reading
SA, SB, SC, SD, SE, SF, SG, SH, SJ Scotland - Glasgow
SK, SL, SM, SN, SO Scotland - Edinburgh
SP, SR, SS, ST Scotland - Dundee
SU, SV, SW Scotland - Aberdeen
SX, SY Scotland - Inverness
VA, VB, VC, VD, VE, VF, VG, VH, VJ, VK, VL, VM, VN, VO, VP, VR, VS, VT, VU, VV, VW, VX, VY Severn Valley - Worcester
WA, WB, WC, WD, WE, WF, WG, WH, WJ West of England - Exeter
WK, WL West of England - Truro
WM, WN, WO, WP, WR, WS, WT, WU, WV, WW, WX, WY West of England - Bristol
YA, YB, YC, YD, YE, YF, YG, YH, YJ, YK Yorkshire - Leeds
YL, YM, YN, YO, YP, YR, YS, YT, YU Yorkshire - Sheffield
YV, YW, YX, YY Yorkshire - Beverley