| WINSTON WINDINGS LIMITED | Surrey | 1967 | Total exemption (full) |
| L.T.H.ELECTRONICS LIMITED | Luton | 1967 | Total exemption (full) |
| SPEIRS ROBERTSON AND COMPANY LIMITED | Ellesmere Port | 1967 | Total exemption (full) |
| MAGNET SCHULTZ LIMITED | Woking | 1967 | Small company accounts |
| M S INSTRUMENTS LIMITED | Bicester | 1967 | Total exemption (full) |
| JANDEL ENGINEERING LIMITED | Leighton Buzzard | 1967 | Total exemption (full) |
| GAST GROUP LIMITED | London | 1967 | Full accounts |
| SURVEILLANCE ELECTRONICS LIMITED | Newark | 1967 | Total exemption (full) |
| S. B. ELECTRONIC SYSTEMS LIMITED | Hertfordshire | 1967 | Total exemption (full) |
| BRUKER UK LIMITED | Coventry | 1967 | Full accounts |
| PERMASIGN LIMITED | Bristol | 1968 | Total exemption (full) |
| MOISTURE CONTROL & MEASUREMENT LIMITED | Yeadon | 1968 | Total exemption (full) |
| ENDRESS + HAUSER LIMITED | — | 1968 | Full accounts |
| CML MICROSYSTEMS PLC | Langford, Maldon | 1968 | Group accounts |
| GOLDING AUDIO LIMITED | Colchester | 1969 | Total exemption (full) |
| TOUCHSTAR ATC LIMITED | Manchester | 1969 | Audit-exempt subsidiary |
| METTLER-TOLEDO LIMITED | Leicester | 1969 | Full accounts |
| EDINBURGH INSTRUMENTS LIMITED | Royston | 1969 | Full accounts |
| AUMOVIO TRADING UK LIMITED | West Midlands | 1969 | Full accounts |
| KEYMED (MEDICAL & INDUSTRIAL EQUIPMENT) LIMITED | Southend-on-Sea | 1969 | Full accounts |
| INTEGREX LIMITED | Swadlincote | 1969 | Total exemption (full) |
| TRACTION CHARGER COMPANY LIMITED | Devizes | 1970 | Total exemption (full) |
| CAMBRIDGE ELECTRONIC DESIGN LIMITED | Cambridge | 1970 | Total exemption (full) |
| AUMOVIO UK LIMITED | Birmingham | 1970 | Full accounts |
| CROWCON DETECTION INSTRUMENTS LIMITED | Abingdon | 1970 | Full accounts |
| CANON MEDICAL SYSTEMS LIMITED | Crawley | 1970 | Full accounts |
| DIGITROL LIMITED | Enterprise Park | 1970 | Total exemption (full) |
| CIRRUS RESEARCH PLC | Hunmanby | 1970 | Full accounts |
| MIRION TECHNOLOGIES (IST) LIMITED | Eastleigh | 1970 | Full accounts |
| CATTRON UK LIMITED | Bristol | 1970 | Small company accounts |
| CITADEL PRODUCTS LIMITED | Wimborne | 1970 | Total exemption (full) |
| DIAL ART(P.C.)LIMITED | Bournemouth | 1971 | Total exemption (full) |
| MURATA POWER SOLUTIONS (CELAB) LIMITED | Bordon | 1971 | Full accounts |
| APPLIED PHOTOPHYSICS LIMITED | Leatherhead | 1971 | Small company accounts |
| AVIRE LIMITED | Maidenhead | 1971 | Full accounts |
| BELL SYSTEM (TELEPHONES) LIMITED | Milton Keynes | 1971 | Unaudited abridged |
| STROUD INSTRUMENTS LIMITED | Stroud | 1971 | Total exemption (full) |
| JAYBEAM LIMITED | Wellingborough | 1971 | Full accounts |
| SPECAC LIMITED | Orpington | 1971 | Full accounts |
| FORWESSUN INTERNATIONAL LIMITED | Speke | 1971 | Total exemption (full) |
| PROCESS MEASUREMENT & ANALYSIS LIMITED | Huddersfield | 1971 | Total exemption (full) |
| DUNPHY COMBUSTION LIMITED | Lancashire | 1971 | Full accounts |
| CLEVELAND CIRCUITS LIMITED | Redcar | 1971 | Total exemption (full) |
| C.V. INSTRUMENTS LIMITED | Sheffield | 1971 | Audit-exempt subsidiary |
| MALVERN PANALYTICAL LIMITED | Malvern | 1971 | Full accounts |
| CAMBRIDGE INSITU LIMITED | Melbourn | 1971 | Total exemption (full) |
| LEACH INTERNATIONAL UK LIMITED | London | 1971 | Total exemption (full) |
| K.D.P. ELECTRONIC SYSTEMS LIMITED | Gamlingay | 1971 | Total exemption (full) |
| PICKERING INTERFACES LIMITED | Clacton-on-Sea | 1971 | Group accounts |
| HACH LANGE LTD | Salford, Manchester | 1971 | Full accounts |
| CRANE ELECTRONICS LIMITED | Hinckley | 1971 | Full accounts |
| WIKA INSTRUMENTS LIMITED | Sevenoaks | 1971 | Full accounts |
| STANDEX ELECTRONICS (U.K.) LIMITED | London | 1971 | Small company accounts |
| MARTIN-WOOLMAN LIMITED | Martinfield, | 1971 | Total exemption (full) |
| GRAPHIC PLC | Crediton | 1971 | Full accounts |
| BAYDEL LIMITED | London | 1972 | Total exemption (full) |
| OXFORD INSTRUMENTS INDUSTRIAL PRODUCTS LIMITED | High Wycombe | 1972 | Total exemption (full) |
| OLIVER IGD LIMITED | Stockport | 1972 | Small company accounts |
| INSTRUMENTATION & CONTROL SERVICES (HEREFORD) LIMITED | Peterchurch | 1972 | Total exemption (full) |
| FRANKLITE LIMITED | Milton Keynes | 1972 | Total exemption (full) |