The locomotives of the old Great Western Railway Company were, in the main, constructed at either Swindon or Wolverhampton workshops, to the design of the six successive engineers, Gooch, Armstrong, Dean, Churchward, Collett and Hawksworth. However, many other strange locomotives found their way on to the Great Western stock lists due to the addition of the Welsh companies and other small lines of the British Iles.

Treffrey & Fowey Railway - Inc 1844 ~ Opd 1842 ~ Amgd 1896

Newquay & Cornish Junction Ry - Inc 1864 ~ Opd 1874 ~ Amgd 1896

Cornwall Minerals Railway - Inc 1873 ~ Amgd 1896

Lostwithiel & Fowey Ry - Inc 1862 ~ Opd 1869 ~ Amgd 1896

Wenlock Railway - Inc 1861 ~ Opd 1864 ~ Amgd 1896

Llangollen & Corwen Ry - Inc 1860 ~ Opd 1865 ~ Amgd 1896

Abbotsbury Railway - Inc 1877 ~ Opd 1885 ~ Amgd 1896

Vale of Llangollen Ry - Inc 1859 ~ Opd 1861 ~ Amgd 1896

Much Wenlock & Severn Junc Ry - Inc1859 ~ Opd 1862 ~ Amgd 1896

Milford Railway - Inc 1856 ~ Opd 1863 ~ Amgd 1896

Marlborough Ry - Inc 1861 ~ Opd 1863 ~ Amgd 1896

Corwen & Bala Ry - Inc 1862 ~ Opd 1866 ~ Amgd 1896

 Great Marlow Railway - Inc 1868 ~ Opd 1873 ~ Amgd 1897

Nantwich & Market Drayton Ry - Inc 1861 ~ Opd 1867 ~ Amgd 1897

Banbury & Cheltenham Direct Ry - Inc 1873 ~ Opd 1881 ~ Amgd 1897

Woodstock Railway - Inc 1886 ~ Opd 1890 Amgd 1897

 Kington & Eardisley Ry - Inc 1862 Opd 1874 ~ Amgd 1897

Pembroke & Tenby Ry - Inc 1859 ~ Opd 1863 ~ Amgd 1897

Buckfastleigh, Totnes & South Devon Ry - Inc 1864 ~ Opd 1872 ~ Amgd 1897

Minehead Railway - Inc 1871 ~ Opd 1874 ~ Amgd 1897

Leominster & Kington Railway - Inc 1854 ~ Opd 1857 ~ Amgd 1898

Helston Railway - Inc 1880 ~ Opd 1897 ~ Amgd 1898

*Rosebush & Fishguard - Inc 1878 ~ Opd 1895 ~ Amgd 1898

Narbeth Road Railway - Inc 1872 ~ Opd 1876 ~ Amgd 1898