| MANDATOR CONTROL SYSTEMS LIMITED | Leicestershire | 1989 | Unaudited abridged |
| SENSOR TECHNOLOGIES U/K LIMITED | Heywood | 1989 | Unaudited abridged |
| BIO-LOGIC SCIENCE INSTRUMENTS LTD | Glossop | 1989 | Small company accounts |
| THURLBY THANDAR INSTRUMENTS LIMITED | Cambridgeshire | 1989 | Full accounts |
| COOPER RESEARCH TECHNOLOGY LIMITED | Nottingham | 1989 | Small company accounts |
| BOWERS METROLOGY LIMITED | Sheffield | 1989 | Full accounts |
| ALRAD INSTRUMENTS LIMITED | Camberley | 1989 | Total exemption (full) |
| MICROWAVE AMPS LTD | Bristol | 1989 | Small company accounts |
| SUNDANCE MULTIPROCESSOR TECHNOLOGY LIMITED | Chesham | 1989 | Unaudited abridged |
| FUTURE DESIGNS LIMITED | London | 1989 | Small company accounts |
| GLOBAL SCANNING UK LTD | St. Ives | 1989 | Small company accounts |
| APPLIED LASER ENGINEERING LIMITED | London | 1989 | Small company accounts |
| HOSIDEN BESSON LIMITED | Hove | 1989 | Medium company accounts |
| PRIMEWORLD LIMITED | Hatfield Heath Bishops Stortford | 1989 | Total exemption (full) |
| SURFACE MEASUREMENT SYSTEMS LIMITED | Middlesex | 1989 | Small company accounts |
| ALBACOM LIMITED | Dundee | 1989 | Total exemption (full) |
| MICALINE ELECTRICAL SYSTEMS LIMITED | Wednesbury | 1990 | Total exemption (full) |
| CAMEO SYSTEMS LIMITED | Wimborne | 1990 | Total exemption (full) |
| G.T.K. (U.K.) LTD. | Basingstoke | 1990 | Full accounts |
| PRECISION ACOUSTICS LIMITED | Dorchester | 1990 | Unaudited abridged |
| SPECTRAL LINE SYSTEMS LIMITED | Peeblesshire | 1990 | Total exemption (full) |
| OLMEC ADVANCED MATERIALS LIMITED | Sheffield | 1990 | Total exemption (full) |
| LEVELSTATE SYSTEMS LIMITED | Alton | 1990 | Total exemption (full) |
| OPTIMAL INDUSTRIAL AUTOMATION LIMITED | Yate | 1990 | Total exemption (full) |
| TECHNETIX LIMITED | Albourne, Hassocks | 1990 | Full accounts |
| DIALIGHT PLC | London | 1990 | Group accounts |
| E.M.R. INTERNATIONAL LIMITED | Off Winterstoke Road | 1990 | Total exemption (full) |
| CHARTER TECH LIMITED | Wimborne | 1990 | Total exemption (full) |
| COASTFORM SYSTEMS LIMITED | Sheffield | 1990 | Total exemption (full) |
| A.W. TECHNOLOGY LIMITED | Leicestershire | 1990 | Total exemption (full) |
| AMULET HOTKEY LTD | Newton Abbot | 1990 | Group accounts |
| SCANFLEX LIMITED | Wirral | 1990 | Small company accounts |
| DRILLING SYSTEMS (U.K.) LIMITED | Airport Hurn Christchurch | 1990 | Total exemption (full) |
| ENVEA UK LTD | Cambridge | 1990 | Full accounts |
| HANDS-ON COMPUTER SOLUTIONS LTD. | Bolton | 1990 | Total exemption (full) |
| SECURE INNOVATION LIMITED | Saltash | 1990 | Full accounts |
| TQ ENVIRONMENTAL LIMITED | Wakefield | 1990 | Total exemption (full) |
| TOSHIBA EUROPE LIMITED | Staines-upon-Thames | 1990 | Full accounts |
| FIORENTINI U.K. LTD. | Warwick | 1990 | Small company accounts |
| METRON DESIGNS LIMITED | Norwich | 1990 | Total exemption (full) |
| ESI TECHNOLOGY LIMITED | Wrexham | 1990 | Small company accounts |
| STONEGATE INSTRUMENTS LIMITED | Leeds | 1990 | Total exemption (full) |
| BELLING LEE LIMITED | London | 1990 | Audit-exempt subsidiary |
| ROXBORO OVERSEAS LIMITED | London | 1990 | Audit-exempt subsidiary |
| RAMTECH ELECTRONICS LIMITED | Nottingham | 1990 | Full accounts |
| SORION ELECTRONICS LIMITED | Ladywood | 1990 | Total exemption (full) |
| WIRE ELECTRIC SUPPLIES LIMITED | Albrighton | 1990 | Total exemption (full) |
| POWTECHNOLOGY LIMITED | Tamworth | 1990 | Total exemption (full) |
| CREO MEDICAL UK LIMITED | Inverness | 1990 | Small company accounts |
| ERGO COMPUTING UK LIMITED | Edwalton | 1990 | Audit-exempt subsidiary |
| VAUGHAN INDUSTRIES LIMITED | Truro | 1990 | Total exemption (full) |
| ASSEMBLY CONTRACTS LIMITED | Wythenshawe Manchester | 1990 | Total exemption (full) |
| ANVILLE INSTRUMENTS LIMITED | Rotherham, | 1990 | Audit-exempt subsidiary |
| PURETECH SYSTEMS LIMITED | Salfords | 1990 | Full accounts |
| CHH CONEX LIMITED | Birmingham | 1990 | Full accounts |
| LEXMARK INTERNATIONAL LTD | Uxbridge | 1990 | Full accounts |
| DIATRON ASSEMBLY SYSTEMS LIMITED | Norwich | 1990 | Total exemption (full) |
| MAGSTRIPE LIMITED | Beds | 1990 | Total exemption (full) |
| AMETEK (GB) LIMITED | Leicester | 1990 | Full accounts |
| A.T.P. INSTRUMENTATION LTD. | Kettering | 1990 | Total exemption (full) |