| C.B.FROST & CO LIMITED | Birmingham | 1948 | Total exemption (full) |
| EXCELSIOR ROTO MOULDING LTD | Bury | 1949 | Total exemption (full) |
| CPV LTD | Aldershot | 1949 | Small company accounts |
| REGINA INDUSTRIES LIMITED | Newcastle | 1949 | Total exemption (full) |
| J. HUDSON AND CO. (WHISTLES) LIMITED | Birmingham | 1949 | Total exemption (full) |
| FENWOOD-BOWEN LIMITED | Bordon | 1949 | Total exemption (full) |
| RUBBARITE LIMITED | — | 1949 | Total exemption (full) |
| SCOT YOUNG RESEARCH LIMITED | West Midlands | 1950 | Group accounts |
| HEAVEN DOWSETT & CO.LIMITED | Great Barr | 1950 | Total exemption (full) |
| PRECISION UNITS (DORSET) LIMITED | Parkstone | 1950 | Total exemption (full) |
| VACULUG LIMITED | Grantham | 1950 | Full accounts |
| ST.DAVIDS ASSEMBLIES LIMITED | Buxton | 1951 | Small company accounts |
| J. & H.M. DICKSON LIMITED | Glasgow | 1951 | Total exemption (full) |
| TENSAR INTERNATIONAL LIMITED | Blackburn | 1952 | Full accounts |
| CHARLESWORTH & SON LIMITED | Sutton Coldfield | 1952 | Total exemption (full) |
| WALKER RUBBER LIMITED | Downham Market | 1952 | Total exemption (full) |
| A. SCHULMAN INC. LIMITED | Newport | 1952 | Full accounts |
| PLASTICS FABRICATION & PRINTING LIMITED | Milton Keynes | 1953 | Total exemption (full) |
| HEXPOL MANCHESTER LTD | Dukinfield | 1953 | Full accounts |
| POVOAS PACKAGING LIMITED | Kettering | 1954 | Full accounts |
| L.J.A.MIERS & COMPANY LIMITED | Huntingdon | 1954 | Small company accounts |
| ASHTEAD ENGINEERING COMPANY LIMITED | West Byfleet | 1954 | Total exemption (full) |
| WATTS URETHANE PRODUCTS LIMITED | Gloucestershire | 1955 | Small company accounts |
| SHAND HIGSON AND CO.LIMITED | Nr Liverpool | 1955 | Total exemption (full) |
| ESSENTRA COMPONENTS LIMITED | Kidlington | 1955 | Audit-exempt subsidiary |
| WEIR & CARMICHAEL LIMITED | Liverpool | 1955 | Total exemption (full) |
| VERSALIS UK LTD | London | 1955 | Full accounts |
| RUTLAND PLASTICS LIMITED | Rutland | 1956 | Full accounts |
| STANLEY VICKERS LIMITED | Cleveland | 1956 | Total exemption (full) |
| PLASTIC FAN CO. LIMITED(THE) | Great Barr | 1956 | Total exemption (full) |
| R. F. CLARKE LTD | Dromore | 1956 | Audited abridged |
| LEY RUBBER LIMITED | Liverpool | 1956 | Total exemption (full) |
| PREFORMED LINE PRODUCTS (GREAT BRITAIN) LIMITED | Hants | 1957 | Full accounts |
| J. & A. KAY LIMITED | Lancashire | 1957 | Total exemption (full) |
| F.R.WARREN & CO. LIMITED | Weston-super-Mare | 1957 | Total exemption (full) |
| TUBEWAY (SALES) LIMITED | Industrial Estate | 1957 | Total exemption (full) |
| WARDEN PLASTICS LIMITED | Luton | 1957 | Total exemption (full) |
| HAROLD FISHER (PLASTICS) LIMITED | Holmfirth | 1957 | Small company accounts |
| B.H.BRAWN & CO.LIMITED | Wellingborough | 1957 | Total exemption (full) |
| BERWIN INDUSTRIAL POLYMERS LIMITED | Dukinfield | 1957 | Small company accounts |
| KEA-FLEX MOULDINGS LIMITED | Surrey | 1958 | Full accounts |
| NOLATO JAYCARE LIMITED | Newcastle upon Tyne | 1958 | Full accounts |
| MAYGATE LIMITED | Bromley | 1958 | Total exemption (full) |
| DALAU LIMITED | Essex | 1958 | Group accounts |
| ALLEN BROTHERS (FITTINGS) LIMITED | Essex | 1958 | Small company accounts |
| ENL LIMITED | Portsmouth | 1958 | Medium company accounts |
| FIFE ENGINEERING COMPANY LIMITED | Dunfermline | 1958 | Total exemption (full) |
| PLASTIC DISPLAYS (BRADFORD) LIMITED | — | 1958 | Small company accounts |
| LANGTEC LIMITED | Accrington | 1958 | Total exemption (full) |
| PARGLAS LIMITED | Avon | 1958 | Total exemption (full) |
| R.W.SIMON LIMITED | Gt Torrington | 1958 | Medium company accounts |
| TAVAK LIMITED | Woking | 1958 | Total exemption (full) |
| PLASTICS AND VENEERS LIMITED | Liverpool | 1958 | Total exemption (full) |
| YORK PLASTICS (ENGINEERING) LIMITED | Malton | 1959 | Unaudited abridged |
| PRITEX LIMITED | Wellington, | 1959 | Full accounts |
| SECOL LIMITED | Norfolk | 1959 | Total exemption (full) |
| ECCLESTON & HART LIMITED | West Midlands | 1959 | Unaudited abridged |
| FERN PLASTIC PRODUCTS LIMITED | Wolverhampton | 1959 | Full accounts |
| OSPREY LIMITED | Scarborough | 1959 | Total exemption (full) |
| RAYBURN PLASTICS LIMITED | — | 1959 | Total exemption (full) |