| MOISTURE CONTROL AND MEASUREMENT (U.K.) LIMITED | Yeadon | 1988 | Total exemption (full) |
| DRILLING SYSTEMS LIMITED | Airport Hurn, Christchurch | 1988 | Audit-exempt subsidiary |
| TELE-PRODUCTS LIMITED | York | 1988 | Audit-exempt subsidiary |
| ENTERPRISE CONTROL SYSTEMS LIMITED | London | 1988 | Medium company accounts |
| WAGTECH PROJECTS LTD | Trowbridge | 1988 | Total exemption (full) |
| INTERPOINT (UK) LIMITED | Yateley | 1988 | Full accounts |
| LUMENTUM TECHNOLOGY UK LIMITED | London | 1988 | Full accounts |
| AEROMARK COMMUNICATIONS LIMITED | — | 1988 | Unaudited abridged |
| INTEGRATED SCIENTIFIC LIMITED | Rotherham | 1988 | Total exemption (full) |
| THE MAGSTIM COMPANY LIMITED | Whitland | 1988 | Medium company accounts |
| P.R.O.V.E. SYSTEMS LIMITED | Kirkcaldy | 1988 | Total exemption (full) |
| JALTEK SYSTEMS LIMITED | Luton | 1988 | Full accounts |
| TECHNIQUIP LIMITED | Weston-super-Mare | 1988 | Total exemption (full) |
| ULTRASONIC SCIENCES LIMITED | Deadbrook Lane Aldershot | 1988 | Total exemption (full) |
| INTEGRATED SECURITY MANUFACTURING LIMITED | Crawley | 1988 | Total exemption (full) |
| LOGOPAK INTERNATIONAL LIMITED | York | 1988 | Full accounts |
| B.V.M. LIMITED | Southampton | 1988 | Total exemption (full) |
| BERTIN EXENSOR LIMITED | Basingstoke | 1988 | Medium company accounts |
| SPELLMAN HIGH VOLTAGE ELECTRONICS LIMITED. | Pulborough | 1988 | Full accounts |
| MICRO MATERIALS LIMITED | Wrexham | 1988 | Total exemption (full) |
| VANDAGRAPH LIMITED | Keighley | 1988 | Total exemption (full) |
| CALIBRE CONTROL INTERNATIONAL LIMITED | Warrington | 1989 | Total exemption (full) |
| WINSLOW ADAPTICS LIMITED | Brecon | 1989 | Total exemption (full) |
| ELECTROLAB LIMITED | Cheltenham | 1989 | Total exemption (full) |
| L.P.D. ELECTRONIC SERVICES LIMITED | Barnards Way Lowestoft | 1989 | Total exemption (full) |
| KOCKUM SONICS (UK) LIMITED | Leighton Buzzard | 1989 | Small company accounts |
| PROFUSION LIMITED | Southend-on-Sea | 1989 | Total exemption (full) |
| PAROTEC SOLUTIONS LIMITED | Manchester | 1989 | Small company accounts |
| DRAYCOTE TECHNOLOGY LTD | Lutterworth | 1989 | Total exemption (full) |
| CHORD ELECTRONICS LIMITED | East Farleigh | 1989 | Total exemption (full) |
| L.A.P. ELECTRICAL LIMITED | Birmingham | 1989 | Full accounts |
| CAMBRIDGE RESEARCH SYSTEMS LIMITED | Rochester | 1989 | Total exemption (full) |
| TSIEN (U.K.) LIMITED | Ely | 1989 | Total exemption (full) |
| SMARTSCAN LIMITED | Corby | 1989 | Total exemption (full) |
| KENCO TECHNIQUES LIMITED | Common Road,kensworth | 1989 | Total exemption (full) |
| APPLIED ACOUSTIC ENGINEERING LIMITED | Great Yarmouth | 1989 | Medium company accounts |
| PARAMOUNT ELECTRONICS LIMITED | Industrial, Aylesbury | 1989 | Unaudited abridged |
| FOCUSRITE AUDIO ENGINEERING LIMITED | High Wycombe | 1989 | Audit-exempt subsidiary |
| ION SCIENCE LIMITED | Royston | 1989 | Full accounts |
| MDS BATTERY LIMITED | Enfield | 1989 | Total exemption (full) |
| ANDOR TECHNOLOGY LIMITED | Belfast | 1989 | Full accounts |
| MULTICELL INTERNATIONAL LIMITED | Broughton Astley | 1989 | Total exemption (full) |
| S.T. GROUP U.K. LIMITED | Heywood | 1989 | Unaudited abridged |
| COOKNELL ELECTRONICS LIMITED | Weymouth | 1989 | Total exemption (full) |
| FUTURE GENERATION SERVICES LTD. | Rochester | 1989 | Audit-exempt subsidiary |
| JOHN CAUNT SCIENTIFIC LIMITED | Bury | 1989 | Total exemption (full) |
| PRP OPTOELECTRONICS LIMITED | Cambridge | 1989 | Total exemption (full) |
| SCIENTIFIC DIGITAL IMAGING LIMITED | Nuffield Road | 1989 | Unaudited abridged |
| BSC FILTERS LIMITED | York | 1989 | Full accounts |
| CASTLE GROUP LIMITED | Scarborough | 1989 | Total exemption (full) |
| DIODES ZETEX SEMICONDUCTORS LIMITED | Oldham | 1989 | Full accounts |
| SEASON ELECTRONICS LIMITED | Havant | 1989 | Small company accounts |
| DIRECTIONAL DATA SYSTEMS LIMITED | Glasgow | 1989 | Total exemption (full) |
| COMUS EUROPE LIMITED | Brightlingsea | 1989 | Small company accounts |
| HAAG-STREIT UK LIMITED | Bishop’s Stortford | 1989 | Full accounts |
| CELTEK ELECTRONICS LIMITED | Cheadle | 1989 | Total exemption (full) |
| HELLERMANNTYTON DATA LIMITED | Crawley | 1989 | Full accounts |
| TRITEC DEVELOPMENTS LIMITED | Sutton, St Helens | 1989 | Total exemption (full) |
| CONTROL MICROSYSTEMS LTD | Bristol | 1989 | Total exemption (full) |
| LEONARDO UK LTD | London | 1989 | Full accounts |