The following employers (named in honour of former UK FTSE 100 companies, with randomly generated tax references and social security numbers) can be used with the test API endpoint:

Name Tax Ref Social Security No
Abrdn 4Y025255 284721
Abbey Life 9Y037400
Abbey National 8Y074604 357083
Aberdeen Asset Management 2Y072708 313701
African Barrick Gold 4Y076180 345904
Aggreko 5Y033129 214101
Alliance & Leicester 7Y048330 228166
Alliance Boots 8Y053800 292066
Alliance Trust 4Y023988 306590
Allied Domecq 0Y030207
Allied Zurich 7Y036779 242062
Amec 9Y018828 300779
Amersham 4Y019961 297635
Amstrad 4Y008846 355181
Argos 2Y052241 352182
Argyll Group 2Y012549 258050
Arjo Wiggins Appleton 0Y040631 205726
ARM Holdings 6Y041972
ASDA Group 4Y070594 240410
Avast 1Y034412 286232
Aveva 9Y070030 324767
BAA 4Y053811 345986
Babcock International 5Y004933 358313
Balfour Beatty 7Y036784 284040
Baltimore Technologies 1Y032860 200131
Bank of Scotland 8Y050022
Bass 5Y064656 220382
Beecham Group 4Y013309 202540
Berisford 4Y060268 354724
BET 0Y013546 279761
BG Group 0Y008282 379633
BHP 0Y005348 216652
BICC 7Y063660 295112
Blue Arrow 3Y024172 267261
Blue Circle Industries 6Y076086
BOC 4Y029323 288755
Bowater 0Y055003
Bookham Technology 5Y072134 202960
BPB Industries 9Y010548 328141
Bradford & Bingley 0Y071744 233690
Brambles Industries 7Y020631 331818
British Aerospace 6Y054200 203373
British Airways 8Y000657
British Home Stores 9Y053906 258990
British Land 2Y073881 293122
British Steel 5Y011369
British & Commonwealth 3Y015424 361960
Britoil 7Y055448 226148
BTR 9Y034330 215920
Burmah Oil 0Y012221 252052
Burton Group 6Y036357 284066
Cable & Wireless Worldwide 7Y065693 251198
Cadbury 6Y055530
Cairn Energy 8Y063805 240901
Capita 3Y008236 212890
Carlton Communications 6Y034758 317357
Carnival Corporation & plc 5Y019220 359842
Carphone Warehouse 0Y046897 314001
Celltech 1Y025024 292949
Centrica 2Y006108 360242
CMG 6Y001352 253190
Coats Viyella 8Y056413 232158
Cobham 2Y036582 243709
Colt Group 2Y008880 223035
Commercial Union Assurance 0Y023331 372349
Consolidated Gold Fields 7Y003888 371774
Cookson Group 3Y009127 303636
Corus Group 0Y003127 392067
Courtaulds 1Y044775 321695
Daily Mail and General Trust 7Y034908 226920
Dalgety 5Y025818 362636
Darktrace 2Y004219 394319
Debenhams 0Y016604
Dechra Pharmaceuticals 8Y025683
De La Rue 7Y055926 308436
Dimension Data Holdings 9Y026327
Direct Line Group 9Y039893
Distillers 3Y015531
Dixons Carphone 6Y065428 282454
Dixons Group 5Y033505 261250
Dowty Group 6Y016470 356998
DSG International 6Y002609 351901
Eagle Star 1Y033704 301721
Eastern Group 0Y019452 308477
EasyJet 1Y008100 357030
ECC Group 0Y042084 307530
Edinburgh Investment Trust 6Y040138 339705
Electrocomponents 0Y071390 304484
EMAP 6Y054365 229248
EMI Group 6Y077750 350110
Energis 6Y057247 298279
Enterprise Inns 4Y070317 269150
Enterprise Oil 6Y036673 250630
Essar Energy 1Y040119 310481
Eurasian Natural Resources Corporation 6Y043647
Eurotunnel 0Y048825 354664
Evraz 5Y004889 333750
Exco International 6Y045810 256120
Exel 9Y065541 260976
Ferguson 2Y052108 243359
Ferranti International 1Y028115 283199
Ferrexpo 4Y027601 373229
FirstGroup 9Y062241 209719
Fisons 3Y015821
Forte 4Y024487 280578
Freeserve 8Y048875 294913
Friends Life 0Y047418 221307
Friends Provident 6Y033642 364828
G4S 0Y023228 239805
Gallaher Group 6Y010215 245364
Gateway Corporation 6Y018644 208173
GEC, formerly General Electric Company 4Y073690 341041
General Accident 7Y073704 367593
George Wimpey 7Y004238 322650
Glaxo Wellcome 3Y015278 298140
Globe Investment Trust 1Y073271 382036
Granada Compass 9Y019429 272782
Granada 8Y078445
Greenall's Group 2Y058149 254764
Grand Metropolitan 5Y002916 335577
Guardian Royal Exchange 3Y026040 366818
Guinness 0Y055045 383969
GUS 5Y039546 329135
GVC Holdings 6Y033190 321903
Habitat Mothercare 7Y013921 349521
Halifax Group 2Y056994 275678
Hambro Life 7Y028078 383593
Hammerson 5Y042329 392284
Hanson 0Y076907 219220
Harbour Energy 8Y003189
Hargreaves Lansdown 1Y068589 294589
Harrisons & Crosfield 9Y075922 310050
Hawker Siddeley 0Y058468
Hays 7Y055495 394098
HBOS Group plc 2Y044034 382279
Hillsdown Holdings 0Y074084 283491
Hiscox 5Y004745
Home Retail Group 0Y059376 267407
Homeserve 0Y068499 337135
House of Fraser 8Y031327
ICAP 8Y017894
Imperial Chemical Industries 0Y054175 215858
Imperial Continental Gas Association 8Y005266 366571
Inchcape 4Y045442 317297
Inmarsat 9Y034291
Innogy Holdings 7Y043677 245525
International Power 5Y023396 330068
Intu 9Y005233 237730
Invensys 0Y016373 205928
Invesco 3Y032497 262994
Investec 2Y052364 218163
ITV 1Y058333 396210
Jaguar 4Y069240
Johnson Matthey 4Y021934 360012
Just Eat Takeaway 3Y012811 212760
Kazakhmys 0Y076894 343435
Kelda Group 3Y016383 388107
Kingfisher 2Y058298
Kingston Communications 7Y031302 222634
Kwik Save Group 4Y044734 237478
Ladbrokes 0Y064744 290353
Laporte 4Y068404 245380
Lasmo 0Y053493 202119
Lattice Group 3Y044333 263629
Logica 0Y011854
London Electricity 3Y041569 285570
Lonhro 3Y023754
Lonmin 8Y038580 221335
Lucas Industries 0Y031371 354071
LucasVarity 8Y045405 250857
Magnet and Southerns 8Y048538 293960
Man Group 0Y028724 304718
Maxwell Communications Corporation 2Y029185 254547
MB-Caradon 1Y031985 388872
Mediclinic International 6Y004733 205073
Meggitt 0Y016770 246981
Melrose 1Y055924 286374
MEPC 6Y025913 315597
Mercury Asset Management 0Y033217 306780
Merlin Entertainments 6Y012125 257269
MFI Furniture 0Y056289 234019
Micro Focus International 4Y043279 297550
Midlands Electricity 9Y078927 398963
Midland Bank 1Y027995 372250
Misys 8Y043090 287862
Mitchells & Butlers 0Y038887 207933
Morrisons 3Y041263
National Westminster Bank 2Y017824 269148
NFC 9Y026562 206228
NMC Health 7Y039768 341520
Northern Foods 0Y002939 336848
Northern Rock 3Y015176 313944
Norwich Union 0Y074399 337440
Nycomed Amersham 0Y075125 205770
O2 3Y063125 232536
Old Mutual 8Y005412 342568
Orange 1Y048370 357635
PartyGaming 7Y029452 254001
P&O 0Y042369
P&O Princess Cruises 6Y002097
Pennon Group 8Y056520
Petrofac 1Y013420 342905
Pilkington 4Y017858 270042
Plessey 7Y075013 393177
Polly Peck 0Y063716 342048
Polymetal International 0Y069258 299363
PowerGen 0Y035809 340928
Provident Financial 0Y064083
Psion 0Y066027 284807
Punch Taverns 1Y059412 384417
Racal Electronics 9Y013772 326381
Railtrack 3Y067010 362926
Randgold Resources 5Y034401 325763
Rank Hovis McDougall 3Y023921 341432
Reckitt and Coleman 5Y058594 303591
Redland 5Y065756 308477
Reed International 1Y055859 239947
Renishaw 7Y063681 302642
Rentokil Initial 6Y070066 372796
Resolution Limited 5Y047897
Resolution plc 2Y060260 327233
Rexam 6Y067134 236660
RMC Group 5Y027626
Rothmans International 8Y030849 376499
J Rothschild 0Y005037 272350
Rowntree's 2Y015167 227346
Royal Insurance 0Y071292 256700
Royal Mail 3Y025058 318394
RSA Insurance Group 2Y021088 372323
Saatchi & Saatchi 9Y075606 318501
Safeway 6Y013429 331950
SABMiller 5Y035828 371529
Scottish & Newcastle 7Y073268 386725
Scottish Hydro Electric 0Y052572 238298
Scottish Power 3Y069929 378895
Sears 0Y038776 327914
Securicor 0Y071600 371935
Sedgwick 4Y055410 299219
Sema Group 1Y034911 276721
Serco 5Y039277 219103
Shell Transport and Trading Company 1Y065521 318063
Shire 3Y056381 209504
Siebe 6Y024377 215669
Sky 7Y022021 218945
SmithKline Beecham 3Y030422 324363
Smiths Industries 4Y016763 344517
Southern Electric 0Y071338 249445
Spirent 7Y040421 365272
Sports Direct 8Y055039 249980
Stagecoach Group 4Y049134 318757
Standard Telephones and Cables 1Y011181 348440
Storehouse 3Y008027 301170
Sun Alliance Group 6Y043519 204760
Sun Life Assurance 7Y008481 204382
Sun Life & Provincial Holdings 4Y068924 381317
Tarmac 8Y058757 220799
Tate & Lyle 3Y033534 314575
Taylor Wimpey 9Y002427 338778
Taylor Woodrow 2Y012055 317763
Telewest Communications 9Y004632
Thames Water 1Y021831
The Energy Group 4Y042743
Thomas Cook Group 6Y042113 290990
Thomson Reuters 6Y070646 321235
Thorn 1Y000280 331805
Thorn EMI 2Y032950 302567
Thus 6Y025252 222763
TI Group 8Y057952 375801
Tomkins 1Y050011
Trafalgar House 5Y006198 205146
Travis Perkins 1Y019955 316842
TSB Group 3Y032170 207325
Trusthouse Forte 6Y071064 203590
TUI Group 4Y050140 336079
TUI Travel 6Y036417 225139
Tullow Oil 0Y022899 318905
Ultramar 0Y039451 290413
Unigate 4Y072023 221969
United Biscuits 9Y054930 262925
United Business Media 5Y017352 387485
Vedanta Resources 6Y046636 261119
Warburg SG 0Y078258 340956
Wellcome 9Y043611 247758
WH Smith 5Y025802 329006
William Hill 3Y050275 315165
Williams Holdings 9Y061350 250885
Willis Corroon 9Y078739 266164
Willis Faber 5Y031428 200780
Wood Group 2Y075953 337021
Worldpay 9Y024067 325520
Woolwich 9Y040520
Yell Group 6Y011459 367883
Zeneca 7Y069991 372377