| SPEAK & ENTER SECURITY LIMITED | 06577301 | London | 28 April 2008 | Liquidation |
| KENTON OPERATIONS LIMITED | 06536116 | Upper Norwood | 17 March 2008 | Liquidation |
| ATHENA FIREPLACES & DESIGN LTD. | SC324065 | Glasgow | 22 May 2007 | Active - Proposal to Strike off |
| ETE RF ENGINEERING LTD | 05680882 | Gerrards Cross | 19 January 2006 | Liquidation |
| XTEK INNOVATIONS LIMITED | 05066876 | Skelmersdale | 8 March 2004 | Liquidation |
| AEROTV LIMITED | 05049500 | West Malling | 19 February 2004 | Liquidation |
| DAVID SMITH PRODUCTS AND SYSTEMS LIMITED | 05001769 | Middlesex | 22 December 2003 | Liquidation |
| MESHHOPPER WI-FI NETWORKS LIMITED | 04843183 | Hove | 23 July 2003 | Liquidation |
| SCHEERHEAT LTD. | 04109756 | | 17 November 2000 | Liquidation |
| IES DIGITAL SYSTEMS PLC | 03970602 | Bristol | 12 April 2000 | Liquidation |
| FABMAX RECEIVABLES LIMITED | 03900382 | London | 29 December 1999 | ADMINISTRATIVE RECEIVER |
| CARON SOLUTIONS INTERNATIONAL LIMITED | 03857697 | Hook | 12 October 1999 | Liquidation |
| AUTOMATION & CONTROL SOLUTIONS LIMITED | 03774711 | Lytham St. Annes | 20 May 1999 | Liquidation |
| ELECTRIC TRACE HEATING (1997) LTD | 03426722 | Leeds | 29 August 1997 | Liquidation |
| KEY EXCELLENCE LIMITED | 03342332 | West Yorkshire | 1 April 1997 | Liquidation |
| LG ELECTRONICS WALES LTD | 03246583 | | 2 September 1996 | Liquidation |
| WAYFIELD TECHNOLOGY LIMITED | 02914196 | Northwich | 29 March 1994 | Liquidation |
| STATOMAT SPECIAL MACHINES LIMITED | 02878787 | St Albans | 8 December 1993 | Liquidation |
| SYNELEC U.K. LIMITED | 02690464 | | 24 February 1992 | Liquidation |
| KAY FOX CONTROLS LIMITED | 02656373 | Oldham | 22 October 1991 | Liquidation |
| BRUMAC ENGINEERING LIMITED | SC131095 | Dundee Technology Park | 12 April 1991 | RECEIVERSHIP |
| PRESTON ELECTRONICS (CHARD) LIMITED | 02393448 | Somerset | 8 June 1989 | Liquidation |
| CREOS LIMITED | SC114956 | Fife | 2 December 1988 | Liquidation |
| BROOKES WILLIAM AND PARTNERS LIMITED | 02176047 | Hatfield Heath | 9 October 1987 | Liquidation |
| FLEX-ABILITY LIMITED | 02122310 | Leeds | 13 April 1987 | Active |
| AFIG ELECTRONICS LIMITED | 01987466 | Swansea | 10 February 1986 | Liquidation |
| VIASYSTEMS TYNESIDE LIMITED | 01937165 | 110 Quayside | 8 August 1985 | Active |
| SKYE EQUIPMENT CO LIMITED | 01887919 | Corby | 20 February 1985 | Liquidation |
| PMC ELECTRONICS LIMITED | 01810662 | Nottingham | 24 April 1984 | Liquidation |
| STADIUM ELECTRICAL PRODUCTS LIMITED | 01788650 | Leeds | 3 February 1984 | Liquidation |
| EXOTHERM PRODUCTS LIMITED | 01697915 | Bristol | 9 February 1983 | Liquidation |
| VIKINGS SWITCHBOARDS LIMITED | 01694644 | Redditch | 26 January 1983 | Active |
| BERKSHIRE-GRANT LIMITED | 01544845 | Esher | 11 February 1981 | Voluntary Arrangement |
| PUMA MANUFACTURING LIMITED | 01518167 | London | 22 September 1980 | ADMINISTRATIVE RECEIVER |
| MIDTOWN CONTROL SYSTEMS LIMITED | 01477288 | Manchester | 5 February 1980 | Liquidation |
| G.K.L. MANLEC LIMITED | 01395151 | Widnes | 20 October 1978 | Liquidation |
| THORSMAN & CO. (U.K.) LIMITED | 01362786 | West Yorkshire | 13 April 1978 | Liquidation |
| DANOR ELECTRONICS LIMITED | 01341684 | Tottle Road | 1 December 1977 | Not in the latest register snapshot (dissolved or removed) |
| POWER TRANSFORMERS (BIRMINGHAM) LIMITED | 01258201 | Birmingham | 12 May 1976 | Liquidation |
| INGRAM ELECTRONIC SERVICES LIMITED | SC057671 | Airdrie | 28 April 1975 | Liquidation |
| ABB LOW VOLTAGE SYSTEMS LIMITED | 01146825 | Lincoln Square | 21 November 1973 | Liquidation |
| CERAMASPEED LIMITED | 01137591 | Birmingham | 3 October 1973 | Liquidation |
| ALSTOM T&D PROTECTION & CONTROL LTD | 00959256 | | 30 July 1969 | Active |
| ASL SYSTEMS LIMITED | 00908900 | Sunderland | 21 June 1967 | Active |
| B.& P.MACKLIN LIMITED | 00835480 | Berkshire | 26 January 1965 | Active |
| OTEHALL SWITCHES LIMITED | 00693265 | London | 19 May 1961 | Liquidation |
| RELIANCE ENGINEERING CO.,(NOTTM)LIMITED | 00629597 | Nottingham | 4 June 1959 | Active |
| HYDER CONE PRODUCTS LIMITED | 00609052 | London | 1 August 1958 | Liquidation |
| PRECISION INSULATION PRODUCTS LIMITED | 00602284 | London | 3 April 1958 | Liquidation |
| 00555199 LIMITED | 00555199 | Shropshire | 28 September 1955 | Active |
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