| UNICLIP LIMITED | Weybridge | 1947 | Small company accounts |
| WALTER FRANK & SONS LIMITED | West Midlands | 1947 | Full accounts |
| SUTCLIFFE PLAY LIMITED | Pontefract | 1947 | Small company accounts |
| TWICKENHAM PLATING GROUP LIMITED | Poole | 1947 | Full accounts |
| BURCAS LIMITED | Newbury | 1947 | Total exemption (full) |
| SARTORIS PRODUCTS LIMITED | Wellingborough | 1947 | Total exemption (full) |
| HISCOCK ENGINEERS (TROWBRIDGE) LIMITED | Wilts | 1947 | Total exemption (full) |
| WEDNESFIELD SHOTBLASTING LIMITED | London | 1947 | Total exemption (small) |
| AYCLIFFE ENGINEERING LIMITED | Newton Aycliffe | 1947 | Total exemption (full) |
| NARVIDA LIMITED | Dunfermline | 1947 | Total exemption (full) |
| TORMAX UNITED KINGDOM LIMITED | Shepperton | 1948 | Full accounts |
| R.WILSON & CO.(PLATERS)LIMITED | Whittington Moor | 1948 | Total exemption (full) |
| SHOVE TURNPARTS LIMITED | Ware | 1948 | Total exemption (full) |
| THANET-WARE (KENT) LIMITED | Bracknell | 1948 | Total exemption (full) |
| MORTIMER SPRINGS LIMITED | Lakeside Redditch | 1948 | Total exemption (full) |
| GESTAMP TALLENT LIMITED | Newton Aycliffe | 1948 | Full accounts |
| CPE PRESSURE VESSELS LIMITED | Tamworth | 1948 | Audit-exempt subsidiary |
| MANCHESTER AUTOMATIC MACHINING COMPANY LIMITED | Cheshire | 1948 | Total exemption (full) |
| MOSSLEY SHEET METAL COMPANY LIMITED | Mossley | 1948 | Unaudited abridged |
| N.D. JIG AND GAUGE COMPANY LIMITED | West Midlands | 1948 | Total exemption (full) |
| CHARLES H. COWARD LIMITED | — | 1948 | Total exemption (full) |
| AJT ENGINEERING LIMITED | Aberdeen | 1948 | Medium company accounts |
| TWICKENHAM PLATING LIMITED | Poole | 1949 | Group accounts |
| JOHN RAINEY & SON LIMITED | Lisburn | 1949 | Small company accounts |
| TAYLOR BROS. (HUDDERSFIELD) LIMITED | Huddersfield | 1949 | Total exemption (full) |
| BROOKVALE MANUFACTURING CO. LIMITED(THE) | Sutton Coldfield | 1949 | Total exemption (full) |
| A.H.GARNER LIMITED | Nottingham | 1949 | Total exemption (full) |
| CHARLES WATTS ENGINEERING LIMITED | Warwickshire | 1949 | Total exemption (full) |
| DANA SPICER EUROPE LIMITED | Stratford-upon-Avon | 1949 | Full accounts |
| SOMERS FORGE LIMITED | Halesowen | 1949 | Full accounts |
| W.S.BARRETT & SON LIMITED | Boston | 1949 | Total exemption (full) |
| ROLLS-ROYCE INDUSTRIAL POWER (INDIA) LIMITED | — | 1949 | Audit-exempt subsidiary |
| R E COOKE LIMITED | Burton on Trent | 1949 | Total exemption (full) |
| CON MECH GROUP LIMITED | Darlington | 1949 | Audit-exempt subsidiary |
| SOLO SPRAYERS LIMITED | Southend-on-Sea | 1949 | Unaudited abridged |
| PORTSMOUTH AVIATION HOLDINGS LIMITED | Hampshire | 1950 | Group accounts |
| C.E.TURNER(ENGINEERS)LIMITED | Melton Mowbray | 1950 | Total exemption (full) |
| L. PICKERING & SONS LIMITED | Warwickshire | 1950 | Total exemption (full) |
| WILLIAM J.GOWAR & COMPANY LIMITED | Romford | 1950 | Total exemption (full) |
| ROLLA LIMITED | Brighouse | 1950 | Audit-exempt subsidiary |
| JOSHUA GREAVES & SONS LIMITED | Bury | 1950 | Total exemption (full) |
| A.POOLE & SON LIMITED | Worcs | 1950 | Full accounts |
| CATERPILLAR (U.K.) LIMITED | Leicester | 1950 | Full accounts |
| GEORGE HUGHES (COBO) LIMITED | Shirley Solihull | 1950 | Small company accounts |
| BENJAMIN PRIEST LIMITED | Kettering | 1950 | Full accounts |
| WESCOL LIMITED | Wolverhampton | 1951 | Total exemption (full) |
| W. CORBETT & CO. (GALVANIZING) LIMITED | Telford | 1951 | Full accounts |
| HOWARD BROS.(ENGRAVERS)LIMITED | Birmingham | 1951 | Total exemption (full) |
| PRESSAVON LIMITED | Warwicks | 1951 | Small company accounts |
| BARZILLAI HINGLEY & SONS LIMITED | Cradley Heath | 1951 | Total exemption (full) |
| SHIELD ENGINEERING (SYSTON) LIMITED | Syston | 1951 | Medium company accounts |
| DRIVE DEVILBISS SIDHIL LIMITED | Halifax | 1951 | Full accounts |
| TUBECLAMPS LIMITED | Cradley Heath | 1951 | Audit-exempt subsidiary |
| ELITE METALCRAFT CO. LIMITED | Greenford | 1951 | Total exemption (full) |
| WILLIAM KING LIMITED | West Bromwich | 1951 | Group accounts |
| AMETEK AIRTECHNOLOGY GROUP LIMITED | Leicester | 1951 | Full accounts |
| SPENCER MANUFACTURING LIMITED | Ludlow | 1951 | Unaudited abridged |
| LANDER AUTOMOTIVE LTD. | Birmingham | 1951 | Full accounts |
| WRIGHT ENGINEERING COMPANY (STRATFORD-ON-AVON) LIMITED(THE) | Warwickshire | 1951 | Total exemption (full) |
| RIVERS ENGINEERING COMPANY (WINCHESTER) LIMITED | Winchester | 1951 | Total exemption (full) |