| REGENT ENGINEERING CO (WALSALL) LIMITED(THE) | Darlaston Wednesbury | 1955 | Total exemption (full) |
| METAL FABRICATION COMPANY (CARDIFF) LIMITED | — | 1955 | Total exemption (full) |
| BARCLAY & MATHIESON LIMITED | Glasgow | 1955 | Group accounts |
| H.L.THORNE & CO.LIMITED | Oldbury | 1955 | Group accounts |
| SPINCRAFT ETG LIMITED | London | 1955 | Small company accounts |
| BEARD ENGINEERING CO. LIMITED(THE) | Nottinghamshire | 1955 | Total exemption (full) |
| V.J.GOODALL LIMITED | Stoke-on-Trent | 1955 | Total exemption (full) |
| CARPENTER & PATERSON LIMITED | Welshpool | 1956 | Full accounts |
| DEESIDE MARINE LTD. | London | 1956 | Total exemption (full) |
| AIR & LIQUID FILTRATION LIMITED | Rowley Regis Warley | 1956 | Total exemption (full) |
| CHAPMANS AGRICULTURAL LIMITED | Sheffield | 1956 | Full accounts |
| WHITELAND ENGINEERING LIMITED | Bideford | 1956 | Total exemption (full) |
| MILLERS RETAIL DESIGN LIMITED | Salford | 1956 | Total exemption (full) |
| BROOK WELDING COMPANY LIMITED(THE) | Alvechurch | 1956 | Total exemption (full) |
| HOLTITE LIMITED | Dudley | 1956 | Total exemption (full) |
| G.NICHOLSON(ENGINEERS)LIMITED | Tyne and Wear | 1956 | Total exemption (full) |
| COLD FORMED PRODUCTS LIMITED | London | 1956 | Small company accounts |
| J. BEATTIE & SON LIMITED | Bootle | 1956 | Total exemption (full) |
| JAMES WALKER MOORFLEX LIMITED | Surrey | 1956 | Full accounts |
| TAPPEX THREAD INSERTS LIMITED | Warwickshire | 1956 | Group accounts |
| GALEID LTD | Preston | 1957 | Total exemption (full) |
| WILSON & SONS (ENGINEERING) LIMITED | Bristol | 1957 | Total exemption (full) |
| PRECISION COMPONENTS & EQUIPMENT LIMITED | Oldham | 1957 | Full accounts |
| SOFT HAMMERS LIMITED | Birmingham | 1957 | Total exemption (full) |
| HEWLAND ENGINEERING LIMITED | Maidenhead | 1957 | Full accounts |
| THOMAS LANE & CO. LIMITED | Stockport | 1957 | Total exemption (small) |
| THOMAS PARISH & SON(HALESOWEN)LIMITED | Cradley Heath | 1957 | Total exemption (full) |
| EMCEL FILTERS LIMITED | West Sussex | 1957 | Total exemption (full) |
| LEEN GATE ENGINEERING CO. LIMITED | Nottingham | 1957 | Small company accounts |
| AMNITEC LIMITED | Mid Glamorgan | 1957 | Full accounts |
| DUPLUS ARCHITECTURAL SYSTEMS LIMITED | Leicester | 1957 | Small company accounts |
| ANGLE RING COMPANY LIMITED(THE) | Tipton | 1957 | Small company accounts |
| ROBERT STEVENS & SONS LIMITED | Leigh-on-Sea | 1957 | Total exemption (full) |
| ABBICOIL SPRINGS LIMITED | Belfast | 1957 | Total exemption (full) |
| TALBOT PLATING CO.,LIMITED | Nelson | 1957 | Total exemption (full) |
| FRETCO LIMITED | Enfield | 1957 | Total exemption (full) |
| HOVAL LIMITED | Notts | 1957 | Full accounts |
| STRIP TINNING LIMITED | Frankley | 1957 | Full accounts |
| ASHLEY ILES (EDGE TOOLS) LIMITED | Spilsby, | 1957 | Total exemption (full) |
| INDUSTRIAL HOSE & PIPE FITTINGS LIMITED | London | 1958 | Audit-exempt subsidiary |
| VERNIER SPRINGS AND PRESSINGS LIMITED | Redditch | 1958 | Small company accounts |
| CATTON CONTROL CABLES LIMITED | Birmingham | 1958 | Total exemption (full) |
| BARKERS ENGINEERING LIMITED | Solihull | 1958 | Audit-exempt subsidiary |
| H.T. BRIGHAM & COMPANY LIMITED | Birmingham | 1958 | Total exemption (full) |
| SAMSON CONTROLS LTD | London | 1958 | Small company accounts |
| L.S. STARRETT COMPANY LTD. (THE) | — | 1958 | Full accounts |
| KENARD ENGINEERING (TEWKESBURY) LIMITED | Kent | 1958 | Small company accounts |
| TRU-THREAD LIMITED | Walsall | 1958 | Small company accounts |
| W.H.ROOKE & CO.(REDDITCH)LIMITED | Redditch | 1958 | Unaudited abridged |
| BIRTLEY GROUP LIMITED | Solihull | 1958 | Full accounts |
| REWINDS AND J. WINDSOR & SONS (ENGINEERS) LIMITED | Bromborough | 1958 | Total exemption (full) |
| WICKSTEED LEISURE LIMITED | Kettering | 1958 | Full accounts |
| FRANK H.DALE LIMITED | Leominster | 1958 | Full accounts |
| ANGUS F. GUNN LIMITED | Airdrie | 1958 | Small company accounts |
| ARTHUR STEPHENSON(ENGINEERS)LIMITED | Atherton | 1958 | Medium company accounts |
| J.T.PEGG & SONS LIMITED | Suffolk | 1958 | Total exemption (full) |
| PENNINE RADIO LIMITED | — | 1958 | Total exemption (full) |
| ADWIN SPRING COMPANY LIMITED | West Midlands | 1958 | Total exemption (full) |
| NEILL TOOLS LIMITED | Sheffield | 1958 | Full accounts |
| PATENT FERRULE COMPANY LIMITED(THE) | Alders Drive | 1958 | Unaudited abridged |