| SMITHS AEROSPACE LIMITED | Basildon | 1964 | Total exemption (full) |
| KONTAX ENGINEERING LIMITED | Maidenhead | 1964 | Total exemption (full) |
| BARENSON ENGINEERING CO.LIMITED | Theale | 1964 | Unaudited abridged |
| FARNWORTH & LANGAN (BLACKBURN) LIMITED | Blackburn | 1964 | Total exemption (full) |
| JACK TIGHE LIMITED | Scunthorpe | 1965 | Full accounts |
| NEWFIELD FABRICATIONS COMPANY LIMITED | Sandbach | 1965 | Medium company accounts |
| DUDLEY TOOL & ENGINEERING CO. LIMITED | Stourbridge | 1965 | Total exemption (full) |
| VOLKOBIND ENGINEERING CO. LIMITED | Brierley Hill | 1965 | Unaudited abridged |
| LESK ENGINEERS LIMITED | Worcester | 1965 | Unaudited abridged |
| FRANKLIN SILENCERS LIMITED | Northamptonshire | 1965 | Total exemption (full) |
| QUALITY COUPLINGS LIMITED | Beaconsfield | 1965 | Total exemption (full) |
| BRAMCOTE LIMITED | Tamworth | 1965 | Total exemption (full) |
| HARTHILL REGRINDING SERVICES LIMITED | Sheffield | 1965 | Total exemption (full) |
| ARDEN DIES LIMITED | Stockport | 1965 | Group accounts |
| H.L.P. TUBE FORMERS LIMITED | Caerphilly | 1965 | Total exemption (full) |
| DAVID BOWLER & SONS LIMITED | Southampton | 1965 | Unaudited abridged |
| JONES & WILKINSON LIMITED | Willenhall | 1965 | Total exemption (full) |
| WHITELEY BROOKS ENGINEERING LIMITED | Binley | 1965 | Total exemption (full) |
| FOX-VPS LTD | Camberley | 1965 | Total exemption (full) |
| HARRY MAIDEN LIMITED | Montrose | 1965 | Total exemption (full) |
| WILLIAM SMITH GROUP 1832 LIMITED | Barnard Castle | 1965 | Full accounts |
| MULTISPARK EROSION LIMITED | Poole | 1965 | Total exemption (full) |
| B.G.T. AUTOMATICS LIMITED | Chichester | 1965 | Total exemption (full) |
| WEALDPARK LIMITED | Lancs | 1965 | Total exemption (full) |
| PLASLANT LIMITED | Coventry | 1965 | Total exemption (full) |
| BLACKHALL ENGINEERING LIMITED | Yorkshire | 1965 | Total exemption (full) |
| SANDFIELD ENGINEERING COMPANY LIMITED | Worcester | 1965 | Total exemption (full) |
| TAYLOR-KIGHTLEY ENGINEERING COMPANY LIMITED | Northampton | 1965 | Total exemption (full) |
| A. W. STOKES & SON (DRUMS) LIMITED | West Bromwich | 1965 | Total exemption (full) |
| WILBEST ENGINEERING COMPANY LIMITED | Leamington Spa | 1965 | Total exemption (full) |
| PARTEX MARKING SYSTEMS (UK) LIMITED | Birmingham | 1965 | Medium company accounts |
| RUBBERNEK FITTINGS LIMITED | Walsall | 1965 | Small company accounts |
| GRIFFIN-WOODHOUSE LIMITED | Cradley Heath | 1965 | Total exemption (full) |
| ELFAB LIMITED | North Shields Tyne and Wear | 1965 | Full accounts |
| POLDI PROPERTIES LIMITED | London | 1965 | Total exemption (full) |
| DAYTON PROGRESS LIMITED | — | 1965 | Full accounts |
| MORGAN MARINE LIMITED | Ammanford | 1965 | Medium company accounts |
| PROGRESSIVE ENGINEERING (ASHTON-U-LYNE) LIMITED | Manchester | 1965 | Total exemption (full) |
| DAWSON PRECISION COMPONENTS LIMITED | Oldham | 1965 | Total exemption (full) |
| RITTAL-C S M LIMITED | Plymouth | 1965 | Full accounts |
| SATCHROME LIMITED | Walsall | 1965 | Unaudited abridged |
| INDUSTRIAL AND TRACTOR LIMITED | Worcs | 1965 | Medium company accounts |
| HY-TEN GROUP LIMITED | Surrey | 1965 | Group accounts |
| MONTGOMERY (ENGRAVERS) LIMITED | Huddersfield | 1965 | Total exemption (full) |
| G.B. ENGINEERING (WALES) LIMITED | Pontypridd | 1965 | Total exemption (full) |
| KILLINCHY AEROSPACE HOLDINGS LIMITED | Uxbridge | 1965 | Group accounts |
| CLYDE FASTENERS LIMITED | Glasgow | 1965 | Total exemption (full) |
| REID & SEYMOUR LIMITED | High Wycombe | 1965 | Unaudited abridged |
| BRANKIN ENGINEERING LIMITED | Newtownabbey | 1965 | Small company accounts |
| MARTIN-BAKER AIRCRAFT COMPANY LIMITED | Near Uxbridge | 1966 | Full accounts |
| DUSTACCO ENGINEERING LIMITED | Ayrshire | 1966 | Medium company accounts |
| ELECTRON BEAM PROCESSES LIMITED | Woking | 1966 | Total exemption (full) |
| K.P.K. (SHEET METAL) LIMITED | Sunbury on Thames | 1966 | Small company accounts |
| CROWLE WHARF ENGINEERS LIMITED | Sheffield | 1966 | Audit-exempt subsidiary |
| ENTERPRISE REALISATIONS LIMITED | Glasgow | 1966 | Full accounts |
| T.MORGAN & SONS(LOCK MANUFACTURERS)LIMITED | Wolverhampton | 1966 | Unaudited abridged |
| PIPAWAY ENGINEERING LIMITED | Maidenhead | 1966 | Total exemption (full) |
| CAPTEC SUBSYSTEMS ENGINEERING LIMITED | Fareham | 1966 | Audit-exempt subsidiary |
| G.O.S. ENGINEERING LIMITED | Blaenavon | 1966 | Small company accounts |
| STRATFORD TOOLS LIMITED | Buckingham | 1966 | Small company accounts |