| C. A. HENDLEY (ESSEX) LIMITED | London | 1978 | Total exemption (full) |
| WESTCRETE PRECAST CONCRETE LIMITED | Axminster | 1978 | Total exemption (full) |
| SPRINGFIELD CHINA LIMITED | Stoke on Trent | 1978 | Total exemption (full) |
| STUART PEASE (FIBREGLASS) LIMITED | Parkgate | 1978 | Total exemption (full) |
| PENYGROES CONCRETE PRODUCTS LIMITED | Llanelli | 1978 | Total exemption (full) |
| SUPREME CONCRETE LIMITED | Leicestershire | 1979 | Full accounts |
| PILKINGTON UNITED KINGDOM LIMITED | Nr. Ormskirk | 1979 | Full accounts |
| MACRETE IRELAND LIMITED | Co Antrim | 1979 | Full accounts |
| HOGAN (ASPHALT) LTD. | Bangor | 1979 | Audit-exempt subsidiary |
| WASHINGTON MILLS ELECTRO MINERALS LIMITED | Manchester | 1979 | Medium company accounts |
| BLACKLAKE SYSTEMS LIMITED | Stone | 1979 | Total exemption (full) |
| THERMOSEAL GLASS EQUIPMENT LIMITED | Birmingham | 1979 | Total exemption (full) |
| GOODMAN GLASSFIBRE LIMITED | Long Buckby Wharf | 1980 | Total exemption (full) |
| JAMES KENT (CERAMIC MATERIALS) LIMITED | — | 1980 | Small company accounts |
| MACHINE COVERS LIMITED | Bisley | 1980 | Total exemption (full) |
| BROWNHILLS GLASS COMPANY LIMITED | Walsall | 1980 | Full accounts |
| PADIHAM GLASS LIMITED | Padiham | 1980 | Small company accounts |
| CERA DYNAMICS LIMITED | Stoke on Trent | 1981 | Small company accounts |
| HOGAN (CONCRETE) LTD | Bangor | 1981 | Audit-exempt subsidiary |
| CHINA BLUE (DEVON) LIMITED | Devon | 1981 | Total exemption (full) |
| RHI REFRACTORIES UK LIMITED | Bonnybridge | 1981 | Full accounts |
| SIMPLY MOULDINGS LIMITED | Surrey | 1981 | Total exemption (full) |
| PLASMOR (HALTON) LIMITED | Knottingley | 1981 | Full accounts |
| GLASS DESIGNS LIMITED | Greenwich London | 1981 | Unaudited abridged |
| VISILUME LIMITED | Glossop | 1982 | Total exemption (full) |
| STRATHCLYDE INSULATING GLASS LIMITED | Hillhouse | 1982 | Total exemption (full) |
| JAT GLASS LIMITED | London | 1982 | Small company accounts |
| F JONES (CLEVELAND) LIMITED | Cleveland | 1982 | Full accounts |
| PREMIER COATINGS LIMITED | Smarden | 1982 | Full accounts |
| MANCHESTER REFRACTORY CO. (1982) LIMITED | Chorley | 1982 | Total exemption (full) |
| STEVENSONS (1982) LIMITED | — | 1982 | Small company accounts |
| WOODSIDE CAST STONE LIMITED | Scunthorpe | 1982 | Total exemption (full) |
| VALANCE GLASS FIBRE COMPANY LIMITED | Atherstone | 1982 | Total exemption (full) |
| STEELITE INTERNATIONAL LIMITED | Stoke-on-Trent | 1983 | Group accounts |
| MAGNA INDUSTRIALS LIMITED | Cheltenham | 1983 | Total exemption (full) |
| W.T. LAMB & SONS LIMITED | Billingshurst | 1983 | Small company accounts |
| SHACKERLEY (HOLDINGS) GROUP LIMITED | Chorley | 1983 | Small company accounts |
| THERMOSEAL GROUP LIMITED | Birmingham | 1983 | Medium company accounts |
| PIPER TOUGHENED GLASS LIMITED | Potters Bar | 1983 | Unaudited abridged |
| CAMDEN GROUP LIMITED | Co Antrim | 1983 | Medium company accounts |
| WHITELEYS (LEADED LIGHTS) LIMITED | Leeds | 1983 | Total exemption (full) |
| MARBLES LIMITED | Bromley | 1983 | Total exemption (full) |
| MOLERODA FINISHING SYSTEMS LIMITED | Salisbury | 1983 | Total exemption (full) |
| MERSEN SCOTLAND HOLYTOWN LIMITED | Holytown | 1983 | Full accounts |
| BONDTREND LIMITED | Gwent | 1983 | Total exemption (full) |
| HOPKINS CONCRETE LIMITED | Birmingham | 1983 | Full accounts |
| CHELMIX CONCRETE LIMITED | Cheltenham | 1984 | Total exemption (full) |
| LARSEN (MANUFACTURING) LIMITED | Belfast | 1984 | Full accounts |
| PROMAT UK LIMITED | Heywood | 1984 | Full accounts |
| SPARKEIT LIMITED | Scunthorpe | 1984 | Total exemption (full) |
| RAEBURN BRICK LIMITED | Blantyre | 1984 | Total exemption (full) |
| GOODWIN REFRACTORY SERVICES LIMITED | Stoke-on-Trent | 1984 | Full accounts |
| HOURGLASS UK LIMITED | Havant | 1984 | Total exemption (full) |
| HIBBITT & SONS (MASONRY) LIMITED | — | 1984 | Unaudited abridged |
| PROMOTIONAL CERAMICS LIMITED | Stoke-on-Trent | 1984 | Unaudited abridged |
| ROTAFIX (NORTHERN) LIMITED | Swansea | 1984 | Unaudited abridged |
| J.P. GLASS & DECOR LIMITED | Field End Road | 1984 | Total exemption (full) |
| ABBEY-CRETE LIMITED | Newtownabbey | 1984 | Total exemption (full) |
| ACO TECHNOLOGIES PLC | Shefford | 1984 | Group accounts |
| VITRUVIUS LIMITED | Redhill | 1984 | Total exemption (full) |