| KETECH SYSTEMS LIMITED | Preston | 2004 | Small company accounts |
| AZATOM GROUP LIMITED | Billingham | 2004 | Total exemption (full) |
| N.D.TECHNOLOGY LIMITED | Southampton | 2004 | Total exemption (full) |
| AIR SCIENCE TECHNOLOGIES LTD | Downholland | 2004 | Total exemption (full) |
| ASPER SYSTEMS LIMITED | Kelso | 2004 | Total exemption (full) |
| L G MOTION LIMITED | Basingstoke | 2004 | Total exemption (full) |
| PAMTRAD CUSTOMS LIMITED | Nottingham | 2004 | Total exemption (full) |
| OPTIMAL INDUSTRIAL TECHNOLOGIES LIMITED | Yate | 2004 | Total exemption (full) |
| DP SYSTEMS (SCOTLAND) LIMITED | Glenrothes | 2004 | Audit-exempt subsidiary |
| AT ENGINE CONTROLS LIMITED | Worsley | 2004 | Small company accounts |
| SPECIALISED IMAGING LIMITED | Leighton Buzzard | 2004 | Total exemption (full) |
| NEXUS INTERFACE SOLUTIONS EUROPE LIMITED | Torpoint | 2004 | Total exemption (full) |
| AEROSPACE METROLOGY & ELECTROMECHANICAL CALIBRATION LIMITED | Newcastle upon Tyne | 2004 | Total exemption (full) |
| POWERPHOTONIC LIMITED | Dalgety Bay | 2004 | Small company accounts |
| PRECISION MICRODRIVES LTD. | London | 2004 | Total exemption (full) |
| PARAMETRIC INVESTMENTS LIMITED | Cambridgeshire | 2004 | Full accounts |
| LEISURE CONTROLS INTERNATIONAL LIMITED | Yeovil | 2004 | Total exemption (full) |
| KIC FM LIMITED | Wolverhampton | 2004 | Total exemption (full) |
| FISTREEM INTERNATIONAL LIMITED | Cambridge | 2004 | Unaudited abridged |
| TSL PROFESSIONAL PRODUCTS LTD. | Marlow | 2004 | Total exemption (full) |
| GYROMETRIC SYSTEMS LIMITED | Long Eaton | 2004 | Total exemption (full) |
| SETRED LIMITED | London | 2004 | Total exemption (full) |
| CYRUS AUDIO LIMITED | Huntingdon | 2004 | Total exemption (full) |
| WAVESIGHT LIMITED | Cambridge | 2004 | Total exemption (full) |
| ASYNT LIMITED | Ely | 2004 | Total exemption (full) |
| IRISGUARD UK LIMITED | Milton Keynes | 2004 | Small company accounts |
| LIVANOVA UK LIMITED | Gloucester | 2004 | Full accounts |
| IPV LIMITED | Cambridge | 2004 | Small company accounts |
| JCM EUROPE (UK) LIMITED | Milton Keynes | 2004 | Full accounts |
| 10SQUARED LIMITED | Pocklington | 2004 | Total exemption (full) |
| MICRO-EPSILON UK LIMITED | Liverpool | 2004 | Total exemption (full) |
| EZURIO UK LIMITED | Bristol | 2004 | Small company accounts |
| AMELEC TECHNICAL SOLUTIONS LIMITED | Towcester | 2004 | Total exemption (full) |
| INTELLIGENT DRIVES LIMITED | Spalding | 2004 | Total exemption (full) |
| BLACKSTAR AMPLIFICATION LTD | Northampton | 2004 | Medium company accounts |
| ENVIROCOMBUSTION SYSTEMS LTD | Cheshire | 2004 | Unaudited abridged |
| RIVERSIDE ELECTRICAL CONTROL SERVICES LIMITED | South Yorkshire | 2004 | Total exemption (full) |
| AUROX LIMITED | Thame | 2004 | Total exemption (full) |
| KNOXED LIMITED | Kidlington | 2004 | Total exemption (full) |
| HPI ENERGY SERVICES LTD | Lincoln | 2004 | Total exemption (full) |
| KOPIN EUROPE LIMITED | Birmingham | 2004 | Small company accounts |
| UAV TACTICAL SYSTEMS LIMITED | Leicester | 2004 | Full accounts |
| INFINERA LIMITED | London | 2004 | Full accounts |
| RTC ELECTRONICS LTD | Coventry | 2004 | Total exemption (full) |
| CORESYS LIMITED | Totnes | 2004 | Unaudited abridged |
| JABEZ TECHNOLOGY LIMITED | Oxfordshire | 2004 | Total exemption (full) |
| NOTE UK HOLDING LIMITED | Windsor | 2004 | Small company accounts |
| OPSODIS LIMITED | Southampton | 2004 | Total exemption (full) |
| RF MODULE AND OPTICAL DESIGN LTD | Cambridge | 2004 | Total exemption (full) |
| YZ SYSTEMS LTD | Sunderland | 2004 | Small company accounts |
| GLEASON METROLOGY SYSTEMS LIMITED | Coventry | 2004 | Full accounts |
| LIVELINK TECHNOLOGY LTD | Chichester | 2004 | Unaudited abridged |
| H W MANUFACTURING LIMITED | Dalgety Bay | 2004 | Total exemption (full) |
| LINDE WERDELIN LTD | London | 2004 | Unaudited abridged |
| PERSPECTIVE INSTRUMENTS LIMITED | Wiltshire | 2004 | Total exemption (full) |
| BOSTON SEMI EQUIPMENT EUROPE LTD. | Maidenhead | 2004 | Total exemption (full) |
| PICO TECHNOLOGY (HOLDINGS) LIMITED | St Neots | 2004 | Group accounts |
| MARINE DATA SYSTEMS LIMITED | Newport | 2004 | Total exemption (full) |
| WESTICA COMMUNICATIONS LIMITED | Glasgow | 2004 | Total exemption (full) |
| WIRELESS MEASUREMENT LIMITED | Hampshire | 2004 | Total exemption (full) |