| SONIC SYSTEMS LIMITED | Ilminster | 1984 | Total exemption (full) |
| ALEXANDER TECHNOLOGIES EUROPE LIMITED | Peterlee | 1984 | Full accounts |
| TAILOR MADE SYSTEMS LIMITED | Rugeley | 1984 | Unaudited abridged |
| CABLE MANAGEMENT SUPPLIES LIMITED | Cirencester | 1984 | Total exemption (full) |
| RML GROUP LIMITED | Wellingborough | 1984 | Medium company accounts |
| AQ WIRING SYSTEMS ROCKFORD LTD | Worksop | 1984 | Medium company accounts |
| TAYLOR STUDWELDING SYSTEMS LIMITED | West Yorkshire | 1984 | Total exemption (full) |
| ELECTRO-TECHNIK LIMITED | Stoke Prior | 1984 | Total exemption (full) |
| IPS NEWCASTLE LTD | Newcastle upon Tyne | 1984 | Full accounts |
| SPECIALIST SWITCHGEAR SYSTEMS LIMITED | Bury | 1984 | Total exemption (full) |
| CHARLES ENDIRECT LIMITED | Wincanton | 1984 | Total exemption (full) |
| S&P UK VENTILATION SYSTEMS LTD. | Ipswich | 1984 | Full accounts |
| D.B.K.- TECHNITHERM LIMITED | Llantrisant | 1984 | Full accounts |
| LILLESON ENG'G SERVICES LIMITED | Parkgate Rotherham | 1984 | Total exemption (full) |
| DAVAL CONTROLS LIMITED | Shropshire | 1984 | Total exemption (full) |
| G.B. CONTROLS LIMITED | Nelson | 1984 | Total exemption (full) |
| CENTRICA BUSINESS SOLUTIONS UK LIMITED | Windsor | 1984 | Full accounts |
| SYNOPTICS LIMITED | Cambridge | 1984 | Audit-exempt subsidiary |
| HANOVER DISPLAYS LIMITED | Lewes | 1985 | Group accounts |
| PAXTON ACCESS LIMITED | East Sussex | 1985 | Full accounts |
| CARNHILL TRANSFORMERS LIMITED | Kidlington | 1985 | Total exemption (full) |
| SARUM ELECTRONICS LIMITED | Croydon | 1985 | Small company accounts |
| D. PRICE & ASSOCIATES LIMITED | Solihull | 1985 | Total exemption (full) |
| GTI POWER GENERATION LTD | Daventry | 1985 | Total exemption (full) |
| M.A. HORNE LIMITED | Bournemouth | 1985 | Total exemption (full) |
| LOUIS POULSEN UK LIMITED | London | 1985 | Small company accounts |
| RION DESIGNS LIMITED | Letchworth Garden City | 1985 | Total exemption (full) |
| SJB ENGINEERING LIMITED | Bristol | 1985 | Total exemption (full) |
| OUTRAM RESEARCH LIMITED | London | 1985 | Total exemption (full) |
| REGGIANI LIMITED | London | 1985 | Small company accounts |
| CONTRONIK LIMITED | Chesterfield | 1985 | Unaudited abridged |
| SIMMONSIGNS LIMITED | Shropshire | 1985 | Medium company accounts |
| AUTOREEL LIMITED | Nottingham | 1985 | Small company accounts |
| MICHAEL SMITH SWITCHGEAR LIMITED | Leicester | 1985 | Small company accounts |
| G.K. SWITCHGEAR LIMITED | Newport Pagnell | 1985 | Total exemption (full) |
| SAFTRONICS LIMITED | West Yorks | 1985 | Audit-exempt subsidiary |
| KENTEC ELECTRONICS LIMITED | Dartford | 1985 | Full accounts |
| ZETA ALARMS LIMITED | Swansea | 1985 | Medium company accounts |
| DYSON TECHNOLOGY LIMITED | Wiltshire | 1985 | Full accounts |
| POWER PRODUCTS (INTERNATIONAL) LIMITED | Kent | 1985 | Total exemption (full) |
| LEDVANCE LTD | Warrington | 1985 | Full accounts |
| ADAPT EMS LTD | Hitchin | 1985 | Total exemption (full) |
| COTHERM (UK) LIMITED | Sudbury | 1986 | Full accounts |
| C E E RELAYS LIMITED | Sandhurst | 1986 | Total exemption (full) |
| CROWN OVERSEAS SERVICES LIMITED | Dargan Crescent | 1986 | Total exemption (small) |
| B & T ASSOCIATES LIMITED | Louth | 1986 | Total exemption (full) |
| AMPHENOL INVOTEC LIMITED | Tamworth | 1986 | Full accounts |
| HARWORTH HEATING LIMITED | South Yorkshire | 1986 | Total exemption (full) |
| M. P. E. ELECTRONICS LIMITED | Uckfield | 1986 | Total exemption (full) |
| LOSTOCK ELECTRICAL PROJECTS COMPANY LIMITED | Bolton | 1986 | Total exemption (full) |
| ELITE ELECTRONIC SYSTEMS LTD | Enniskillen | 1986 | Full accounts |
| ELECTRONIC & TECHNICAL SERVICES LTD. | Wirral | 1986 | Unaudited abridged |
| SAAB SEAEYE LIMITED | Fareham | 1986 | Medium company accounts |
| GLAMOX LIMITED | Hampshire | 1986 | Full accounts |
| PBSI GROUP LIMITED | Manchester | 1986 | Total exemption (full) |
| LINCAD LIMITED | Ash Vale | 1986 | Small company accounts |
| SERVICEPOWER LIMITED | Shipley | 1986 | Total exemption (full) |
| CHATSWORTH INDUSTRIAL LTD | Chesterfield | 1986 | Total exemption (full) |
| COULSTOCK & PLACE ENGINEERING CO LIMITED | Dartford | 1986 | Small company accounts |
| UPERGY LIMITED | Solihull | 1986 | Full accounts |