| MICROPLUS ENGINEERING LIMITED | Stourbridge | 1980 | Unaudited abridged |
| L.H. (QUARRY PLANT) LIMITED | Bishop Auckland | 1980 | Small company accounts |
| COLCHESTER REWINDS PLANT AND ENGINEERING LIMITED | Colchester | 1980 | Total exemption (full) |
| PFEIFER DRAKO LTD | Crewe | 1980 | Full accounts |
| REMENCO LIMITED | Glenrothes | 1980 | Total exemption (full) |
| ENGINEERING DYNAMICS (SOUTHERN) LIMITED | Chandlers Ford | 1980 | Total exemption (full) |
| FRANK DUDLEY LIMITED | Birmingham | 1980 | Total exemption (full) |
| BLACKROW ENGINEERING CO. LIMITED | Grimsby | 1980 | Full accounts |
| UNIVERSAL BOLTFORGERS LIMITED | Oldbury | 1980 | Total exemption (full) |
| C.N.C. PUNCHING LIMITED | Leicester | 1980 | Total exemption (full) |
| TRANSVAC SYSTEMS LIMITED | Alfreton | 1980 | Full accounts |
| LONSDALE METAL COMPANY LIMITED | Millmead Road | 1980 | Total exemption (full) |
| APS METAL PRESSINGS LIMITED | Birmingham | 1980 | Small company accounts |
| SALESMADE LIMITED | Aylesbury | 1980 | Total exemption (full) |
| THERMAL DEVELOPMENTS INTERNATIONAL LIMITED | Southport | 1980 | Total exemption (full) |
| WITZENMANN UK LIMITED | Bellshill | 1980 | Small company accounts |
| JIG BORING SERVICES (WITHNELL) LIMITED | — | 1981 | Total exemption (full) |
| HOLBRO ENGINEERING LIMITED | Fleetwood | 1981 | Total exemption (full) |
| CRIPTIC-ARVIS LIMITED | Abingdon | 1981 | Audit-exempt subsidiary |
| GENWORK LIMITED | Halesowen | 1981 | Total exemption (full) |
| A. I. G. ENGINEERING LIMITED | Cheadle | 1981 | Total exemption (full) |
| HARLEY ENGINEERING LIMITED | Huntingdon | 1981 | Total exemption (full) |
| MATTHEWS & SON (HANLEY) LIMITED | Stoke-on-Trent | 1981 | Unaudited abridged |
| DALEN LIMITED | West Midlands | 1981 | Full accounts |
| GLEN WILSON LIMITED | Hull | 1981 | Total exemption (full) |
| LYMINGTON PRECISION ENGINEERS CO. LIMITED | Rickmansworth | 1981 | Full accounts |
| E.M.U. ENGINEERING LIMITED | Kingswinford | 1981 | Total exemption (full) |
| JAMES WALKER ROTABOLT LIMITED | Surrey | 1981 | Audit-exempt subsidiary |
| SHELLEY (HALESOWEN) LIMITED | Birmingham | 1981 | Total exemption (full) |
| HB ALUMINIUM FABRICATIONS LIMITED | Leeds | 1981 | Total exemption (full) |
| CENTRISTIC LIMITED | Newton Abbot | 1981 | Total exemption (full) |
| STRAIGHT LINE ENGINEERING LIMITED | Nelson | 1981 | Total exemption (full) |
| PHIL HOLDEN FASTENERS LIMITED | Broughton Astley | 1981 | Full accounts |
| TEESCRAFT ENGINEERING LIMITED | Bishop Auckland | 1981 | Group accounts |
| BRAMLEY ENGINEERING (LIFTING GEAR) LIMITED | Billington Road | 1981 | Total exemption (full) |
| TYREE FABRICATIONS LIMITED | Sheffield | 1981 | Unaudited abridged |
| VELDEN ENGINEERING (U.K.) LTD | Bolton | 1981 | Full accounts |
| LAURENCE BUTLER LIMITED | Camborne | 1981 | Total exemption (full) |
| A.E. CALLARD (ENGINEERING) LIMITED | London | 1981 | Total exemption (full) |
| SEALPOWER LIMITED | Flintshire | 1981 | Total exemption (full) |
| AFON ENGINEERING LIMITED | Swansea | 1981 | Small company accounts |
| GRAY FABRICATION LIMITED | Cupar | 1981 | Total exemption (full) |
| PLYMOUTH ENGINE & GEARBOX COMPANY LIMITED | Plymouth | 1981 | Unaudited abridged |
| MAN ACOUSTICS LIMITED | Birmingham | 1981 | Total exemption (full) |
| FAMWELD LIMITED | Milford Haven | 1981 | Total exemption (full) |
| METAL BOX TECHNOLOGY SOLUTIONS LIMITED | Newhaven | 1981 | Total exemption (full) |
| JHAIDEV ENGINEERING LIMITED | Hockley Birmingham | 1981 | Full accounts |
| ROE BROS. & CO LTD. | Peterborough | 1981 | Medium company accounts |
| CUSTOM FITTINGS LIMITED | Leeds | 1981 | Total exemption (full) |
| MID-WALES WELDED PRODUCTIONS LIMITED | Llanidloes | 1981 | Total exemption (full) |
| BURLEY FABRICATIONS LIMITED | Darnall | 1981 | Total exemption (full) |
| TARA FABRICATION LIMITED | East Kilbride | 1981 | Unaudited abridged |
| R.H.F. FANS LIMITED | Manchester | 1981 | Total exemption (full) |
| BILLINGTON STRUCTURES LIMITED | Barnsley | 1981 | Full accounts |
| INTIME ENGINEERING (LEDBURY) LIMITED | Malvern | 1981 | Total exemption (full) |
| ABBEY STEEL AND SHEARING COMPANY LIMITED | Stanmore | 1981 | Total exemption (full) |
| ELECTRIX INTERNATIONAL LIMITED | County Durham | 1981 | Medium company accounts |
| PRECISION LAPPING LIMITED | Titchfield | 1981 | Total exemption (full) |
| JAFCO TOOLS LTD. | London | 1981 | Total exemption (full) |
| STOVAX GAZCO LTD | Exeter | 1981 | Medium company accounts |