| ANGLIA FABRICATION & DESIGN LIMITED | Newmarket | 1969 | Total exemption (full) |
| UNISEED ENGINEERING LIMITED | Bury St Edmunds | 1969 | Total exemption (full) |
| LAMBERTS LONDON LIMITED | Watford | 1969 | Total exemption (full) |
| WEAR RESISTANCE LIMITED | Sheffield | 1969 | Total exemption (full) |
| CAUNTON ENGINEERING LIMITED | Nottingham | 1969 | Full accounts |
| MINI-CESSORIES LIMITED | Birmingham | 1969 | Total exemption (full) |
| ALEXANDER POLLOCK LIMITED | East Lothian | 1969 | Audit-exempt subsidiary |
| CHROMALLOY UNITED KINGDOM LIMITED | Ipswich | 1970 | Full accounts |
| GEN-VENT (METALWORKERS) LIMITED | South Norwood | 1970 | Total exemption (full) |
| HY-RAM ENGINEERING COMPANY LIMITED | Nottinghamshire | 1970 | Full accounts |
| DOUGHTY ENGINEERING LIMITED | Ringwood | 1970 | Total exemption (full) |
| HILLCREST MACHINERY & ENGINEERING (PORTCHESTER) LIMITED | Fareham | 1970 | Total exemption (full) |
| RICHARD ALAN ENGINEERING COMPANY LIMITED | Dewsbury | 1970 | Full accounts |
| AYRSHIRE PRECISION ENGINEERING LIMITED | Ayr | 1970 | Total exemption (full) |
| SHEARLINE PRECISION ENGINEERING LIMITED | Ely Cambridgeshire | 1970 | Full accounts |
| MILLHILL SUPPLIES LIMITED | Harrow | 1970 | Total exemption (full) |
| AUTOMATIC PRECISION TURNING (LEICESTER) LIMITED | Ashby de la Zouch | 1970 | Total exemption (full) |
| SINCLAIR STAINLESS FABRICATIONS LIMITED | Norwich | 1970 | Total exemption (full) |
| J.W.ENGINEERING LIMITED | Nottingham | 1970 | Small company accounts |
| PERMAT MACHINES LIMITED | Birmingham | 1970 | Small company accounts |
| AALBERTS HFC LIMITED | St Helens | 1970 | Full accounts |
| JAYLEW (ENGINEERING) LIMITED | Grantham | 1970 | Total exemption (full) |
| INDUCTION HEAT TREATMENTS (MANCHESTER) LIMITED | High Peak | 1970 | Unaudited abridged |
| BOWMILL ENGINEERING LIMITED | Poole | 1970 | Group accounts |
| ACETARC LIMITED | Keighley | 1970 | Total exemption (full) |
| CONSTANT GROUP LTD | Oldham | 1970 | Total exemption (full) |
| WHITEHOUSE ENGINEERING COMPANY LIMITED | Newtownabbey | 1970 | Total exemption (full) |
| R.E.KNIGHT LIMITED | Rochester | 1970 | Total exemption (full) |
| WHITTLESEY ENGINEERING COMPANY LIMITED | Peterborough | 1970 | Total exemption (full) |
| WHITECROSS RING CO. LIMITED | Bradford | 1970 | Total exemption (full) |
| ACTION HANDLING EQUIPMENT LIMITED | Sawbridgeworth | 1970 | Total exemption (full) |
| TENON ENGINEERING LIMITED | Dorking | 1970 | Total exemption (full) |
| R.P.M. SHOPFRONT MANUFACTURERS LIMITED | Brynmenyn | 1970 | Total exemption (full) |
| TERENCE BARKER LIMITED | Haverhill | 1970 | Total exemption (full) |
| WATERTON ENGINEERING CO. LIMITED | Oldham | 1970 | Total exemption (full) |
| POLLARD PRECISION ENGINEERING LIMITED | Tewkesbury | 1970 | Total exemption (full) |
| A.W.PRECISION LIMITED | Rugby | 1970 | Small company accounts |
| CONNECTORS & SWITCHGEAR LIMITED | Banbury | 1970 | Total exemption (full) |
| NORTH SEA WINCHES LIMITED | N Yorkshire | 1970 | Total exemption (full) |
| COLLIS ENGINEERING LIMITED | Alfreton | 1970 | Full accounts |
| PRESSPART MANUFACTURING LIMITED | Lancashire | 1970 | Full accounts |
| LONGAR INDUSTRIES LIMITED | Andover | 1970 | Total exemption (full) |
| MERCIAN WELDCRAFT LIMITED | West Midlands | 1971 | Total exemption (full) |
| RMIG LIMITED | Birchwood | 1971 | Full accounts |
| NORMAND & THOMSON (HILLEND) LIMITED | Dunfermline | 1971 | Total exemption (full) |
| DORCAS ENGINEERING LIMITED | St. Neots | 1971 | Total exemption (full) |
| PHOTOFABRICATION LTD | Cambridgeshire | 1971 | Total exemption (full) |
| ROLLS-ROYCE PLC | London | 1971 | Group accounts |
| BEDE GROUP LIMITED | Birtley | 1971 | Total exemption (full) |
| THE GUARDIAN SHUTTER COMPANY LIMITED | — | 1971 | Total exemption (full) |
| WILLIAM HINSLEY ENGINEERS LIMITED | Sowerby Bridge | 1971 | Total exemption (full) |
| HYDRAULIC TECHNICAL SERVICES (CONSULTANTS)LIMITED | Slough | 1971 | Total exemption (full) |
| FLOW-MON LIMITED | Harrogate | 1971 | Total exemption (full) |
| MENRICA ENGINEERING CO. LIMITED | Warks | 1971 | Unaudited abridged |
| TRANSBELT LIMITED | Liverpool | 1971 | Total exemption (full) |
| NON STANDARD SOCKET SCREW LIMITED | Birmingham | 1971 | Group accounts |
| O.L.D. ENGINEERING COMPANY LIMITED | Leicester | 1971 | Medium company accounts |
| BRIMGLADES LIMITED | Rainham | 1971 | Unaudited abridged |
| CLARKSTEEL HOLDINGS LIMITED | Peterborough | 1971 | Medium company accounts |
| CREIGHTON & SON LIMITED | Stanmore | 1971 | Total exemption (full) |