| DOEPKE UK LTD | Daventry | 1974 | Small company accounts |
| RASMI ELECTRONICS LIMITED | Stanley | 1974 | Total exemption (full) |
| LUCY ELECTRIC UK LIMITED | Oxford | 1974 | Full accounts |
| 101 ENGINEERING LIMITED | Stonehouse | 1974 | Total exemption (full) |
| RICHARD WILSON (DENCOL) LIMITED | West Yorkshire | 1974 | Total exemption (full) |
| C.G. & W. YOUNG LIMITED | Twickenham | 1974 | Total exemption (full) |
| PRESTOLITE ELECTRIC LIMITED | Middlesex | 1974 | Full accounts |
| CAMBRIAN CONSTRUCTION EQUIPMENT LIMITED | Cardiff | 1974 | Total exemption (full) |
| ENRX LTD. | Well Lane | 1974 | Full accounts |
| DUDLEY AERIAL SERVICES LIMITED | Kingswinford | 1975 | Total exemption (full) |
| EATON MEDC LIMITED | Sutton-in-Ashfield | 1975 | Full accounts |
| SOUTH WOODFORD ELECTRONICS LIMITED | Southmill Road | 1975 | Total exemption (full) |
| EBM - PAPST UK LIMITED | Essex | 1975 | Full accounts |
| RJW ENGINEERING (MANCHESTER) LIMITED | Bromborough | 1975 | Total exemption (full) |
| FIDGEON LIMITED | Peterlee | 1975 | Total exemption (full) |
| RAP INDUSTRIES LIMITED | Peterborough | 1975 | Total exemption (full) |
| T.W. GENERATORS LIMITED | Marsworth Tring | 1975 | Total exemption (full) |
| ANGLEPOISE HOLDINGS LIMITED | Waterlooville | 1975 | Total exemption (full) |
| CLUSON ENGINEERING LIMITED | Petersfield | 1975 | Total exemption (full) |
| PILLER UK LIMITED | Cirencester | 1975 | Audit-exempt subsidiary |
| LEICESTER SWITCH & CONTROL CO. LIMITED | Rothley | 1976 | Small company accounts |
| KENDA ELECTRONIC SYSTEMS LIMITED | Southampton | 1976 | Total exemption (full) |
| LAPLACE CALEDONIA INSTRUMENTATION LIMITED | Glasgow | 1976 | Total exemption (full) |
| E-T-A CIRCUIT BREAKERS LTD | Buckinghamshire | 1976 | Small company accounts |
| PORTAPROMPT LIMITED | High Wycombe | 1976 | Unaudited abridged |
| BRINSEA PRODUCTS LIMITED | Weston-super-Mare | 1976 | Total exemption (full) |
| HABIA CABLE LIMITED | Mansfield | 1976 | Small company accounts |
| KEC LIMITED | Reading | 1976 | Total exemption (full) |
| ORANGE MUSIC ELECTRONIC COMPANY LIMITED | Borehamwood | 1976 | Full accounts |
| TRANSFLO INSTRUMENTS LIMITED | Tunbridge Wells | 1977 | Total exemption (full) |
| RONBAR FACTORS LIMITED | Washington | 1977 | Total exemption (full) |
| SCATCO EUROPA LIMITED | Leeds | 1977 | Small company accounts |
| ELECTRIC ENGINEERING CO. LTD. | Witney | 1977 | Total exemption (full) |
| D.W. WINDSOR LIMITED | Telford | 1977 | Audit-exempt subsidiary |
| GENERAL PANEL SYSTEMS LIMITED | Bristol | 1977 | Audit-exempt subsidiary |
| GLEN DIMPLEX UK LIMITED | Southampton | 1977 | Full accounts |
| POWER DEVICE UK LIMITED | Ryde | 1977 | Full accounts |
| SILVER FOX LIMITED | Welwyn Garden City | 1977 | Total exemption (full) |
| DEEP SEA ELECTRONICS LIMITED | Hunmanby | 1977 | Full accounts |
| FABRINET UK LIMITED | London | 1977 | Small company accounts |
| EXCEPTION PCB LIMITED | Tewkesbury | 1977 | Small company accounts |
| PATOL LTD. | Reading | 1977 | Small company accounts |
| EATON ELECTRICAL PRODUCTS LIMITED | Slough | 1977 | Full accounts |
| G.B. LIGHTING LTD. | Tonbridge | 1977 | Total exemption (full) |
| OK INTERNATIONAL LIMITED | Eastleigh | 1977 | Full accounts |
| STEPHENSON CONTROL SYSTEMS LIMITED | Harrogate | 1978 | Total exemption (full) |
| FRINGE ELECTRONICS LIMITED | Ware | 1978 | Small company accounts |
| TT ELECTRONICS FAIRFORD LIMITED | Gloucestershire | 1978 | Full accounts |
| ELTHERM UK LIMITED | Newbury | 1978 | Small company accounts |
| PHILIP PAYNE LIMITED | North Moons Moat, Redditch | 1978 | Audit-exempt subsidiary |
| GIBBONS ENGINEERING GROUP LTD | Maldon | 1978 | Total exemption (full) |
| BARNBROOK SYSTEMS LIMITED | Hampshire | 1978 | Total exemption (full) |
| SIGNAL GROUP LIMITED | Camberley | 1978 | Total exemption (full) |
| STEVENS & BILLINGTON LIMITED | East Sussex | 1978 | Total exemption (full) |
| DEXTRA GROUP PLC | Dorset | 1978 | Group accounts |
| LER LTD | Rotherham | 1978 | Total exemption (full) |
| T.P. FAY (KIRKBY) LIMITED | Merseyside | 1978 | Total exemption (full) |
| CUBIC TRANSPORTATION SYSTEMS LIMITED | Salfords Redhill | 1978 | Full accounts |
| HEATING (SOUTHWEST) LIMITED | Liskeard | 1978 | Total exemption (full) |
| BWT UK LIMITED | High Wycombe | 1978 | Full accounts |