| MIRRORS & GLASS (STOCKPORT) LIMITED | — | 1966 | Total exemption (full) |
| R.B. RADLEY & COMPANY LIMITED | Essex | 1966 | Medium company accounts |
| THERMAL CERAMICS UK LIMITED | Wirral | 1966 | Full accounts |
| M.S.R. ELECTRONICS LIMITED | Nr Coventry | 1966 | Total exemption (full) |
| BLUNDELL PRODUCTION EQUIPMENT LIMITED | Coventry | 1968 | Small company accounts |
| SIA ABRASIVES (G.B.) LTD | Greetland, Halifax | 1968 | Full accounts |
| HAMPSHIRE (R & D) GLASSWARE LIMITED | Portsmouth | 1968 | Total exemption (full) |
| CERAMIC SUBSTRATES & COMPONENTS LIMITED | Newport | 1968 | Total exemption (full) |
| NIXON INDUSTRIAL DIAMONDS LIMITED | Southampton | 1968 | Total exemption (full) |
| CALUMITE LIMITED | Maidenhead | 1969 | Full accounts |
| VULCAN REFRACTORIES LIMITED | Stoke-on-Trent | 1969 | Small company accounts |
| MIDLAND TOOL AND DESIGN LIMITED | West Midlands | 1969 | Medium company accounts |
| J.K.H.DRAINAGE UNITS LIMITED | Bury St. Edmunds | 1969 | Full accounts |
| DOG LANE BLOCKWORKS LIMITED | Horsford | 1969 | Total exemption (full) |
| ROCKWOOL LIMITED | Bridgend | 1970 | Full accounts |
| WILLIAM RAINFORD (HOLDINGS) LIMITED | Maryport | 1970 | Small company accounts |
| CPM GROUP LIMITED | Elland | 1971 | Audit-exempt subsidiary |
| H.L.PERFITT LIMITED | Ipswich | 1971 | Audit-exempt subsidiary |
| VRI COMPOSITES UK LTD | Bradford | 1971 | Small company accounts |
| GORICON METALLURGICAL SERVICES LIMITED | Doncaster | 1972 | Small company accounts |
| STOWELL CONCRETE LIMITED | Somerset | 1972 | Full accounts |
| BONNAR READY MIX CONCRETE LIMITED | Glasgow | 1972 | Total exemption (full) |
| HUDDERSFIELD PLATE GLASS CO. LIMITED | Huddersfield | 1972 | Total exemption (full) |
| BOYER-BRANSDEN ELECTRONICS LIMITED | Maidstone | 1972 | Total exemption (full) |
| TOWER GLASS (BOURNEMOUTH) LIMITED | Bournemouth | 1973 | Audit-exempt subsidiary |
| GLAS-SEAL (NI) LIMITED | Co Down | 1973 | Small company accounts |
| LEAKES MASONRY LIMITED | Louth | 1973 | Total exemption (full) |
| YIELDCONE LIMITED | Tunstall | 1973 | Total exemption (full) |
| CPL PRODUCTS LIMITED | Sheffield | 1973 | Full accounts |
| JORDAN CONCRETE LTD | Lisburn | 1973 | Total exemption (full) |
| BASTION GLASSFIBRE ROD & SECTIONS LIMITED | Team Valley Trading Estate | 1973 | Total exemption (full) |
| N.L. WILLIAMS GROUP LIMITED | Merseyside | 1973 | Unaudited abridged |
| B.H.W. CERAMICS LIMITED | Telford | 1973 | Total exemption (full) |
| MONOCON INTERNATIONAL REFRACTORIES LIMITED | Doncaster | 1973 | Full accounts |
| LUBKOWSKI SAUNDERS AND ASSOCIATES LIMITED | Liverpool | 1973 | Group accounts |
| U.Q.G. LIMITED | Cambridge | 1973 | Total exemption (full) |
| DUNOON CERAMICS LIMITED | Edinburgh | 1974 | Total exemption (full) |
| GORDON HARRISON LIMITED | Notton | 1974 | Total exemption (full) |
| COLES ELECTROACOUSTICS LIMITED | Herts | 1974 | Total exemption (full) |
| ANGUS MACIVER LIMITED | Isle of Lewis | 1974 | Total exemption (full) |
| SAM CRYER LIMITED | Harrogate | 1974 | Total exemption (full) |
| TAB REFRACTORY CONSTRUCTION & MAINTENANCE CO. LIMITED | Warrington | 1974 | Small company accounts |
| CASTLE CONCRETE LIMITED | — | 1974 | Small company accounts |
| LEIGH GLASS CO. LIMITED | Lancashire | 1974 | Total exemption (full) |
| JOHN ARTIS LIMITED | Surrey | 1975 | Full accounts |
| OIL - DRI (U.K.) LIMITED | Cambridgeshire | 1975 | Small company accounts |
| FAIREY INDUSTRIAL CERAMICS LIMITED | Stoke on Trent | 1975 | Full accounts |
| JAMES A. JOBLING AND COMPANY LIMITED | Newcastle upon Tyne | 1976 | Full accounts |
| TOBERMORE CONCRETE PRODUCTS LIMITED | Magherafelt | 1976 | Full accounts |
| MARROSE ENGINEERING LIMITED | Becks Road | 1976 | Total exemption (full) |
| SHEFFIELD REFRACTORIES LIMITED | Sheffield | 1976 | Medium company accounts |
| ARDMORE (CO.DERRY) PRE-CAST CONCRETE LIMITED | Co Londonderry | 1976 | Total exemption (full) |
| YORK GLASSWARE SERVICES LIMITED | York | 1976 | Total exemption (full) |
| SPENCROFT CERAMICS LIMITED | Newcastle | 1976 | Total exemption (full) |
| ROY KIRKHAM & CO. LIMITED | Stoke-on-Trent | 1976 | Total exemption (full) |
| ROBERT LICKLEY REFRACTORIES LIMITED | Dudley | 1977 | Total exemption (full) |
| ELMELIN LIMITED | Ringwood Road | 1977 | Total exemption (full) |
| EXCEL GLASS LIMITED | Belfast | 1977 | Unaudited abridged |
| WALTHER TROWAL LIMITED | Stoke on Trent | 1977 | Small company accounts |
| WELDON STONE ENTERPRISES LIMITED | Corby | 1977 | Unaudited abridged |