not necessarily an exhaustive list
but pretty impressive nonetheless and in no particular order
Great Western Railway
London and North Eastern Railway
London, Midland and Scottish Railway
Southern Railway
Great Eastern Railway
Great Central Railway
Great Northern Railway
Great North of Scotland Railway
Hull and Barnsley Railway
North British Railway
North Eastern Railway
Colne Valley and Halstead Railway
East and West Yorkshire Union Railway
Mid-Suffolk Light Railway
Brackenhill Light Railway (West Yorkshire)
Fawcett Depot line (County Durham)
Great North of England, Clarence and Hartlepool Junction line
Humber Commercial Railway and Dock
Mansfield Railway
North Lindsey Light Railway
Seaforth and Sefton Junction Railway
Sheffield District Railway
London and Blackwall Railway
East Lincolnshire Railway
Horncastle Railway
Nottingham and Grantham Railway and Canal
Nottingham Suburban line
Stamford and Essendine Railway
Edinburgh and Bathgate Railway
Forth and Clyde Junction Railway
Gifford & Garvald Railway
Glasgow and Milngavie Junction Railway
Kilsyth and Bonnybridge railway
Lauder Light Railway
Newburgh and North Fife Railway
South Yorkshire Junction Railway
West Riding and Grimsby Railway
East London Railway:
Southern Railway,
Metropolitan Railway
District Railway.
Cheshire Lines Committee (CLC): Railway
Manchester, South Junction and Altrincham Railway
Great Northern and Great Eastern Joint Railway
Hull and Barnsley and Great Central Joint Railway
Axholme Joint Railway
Cheshire Lines Committee
Caledonian and Dunbartonshire Junction Railway
Dundee and Arbroath Railway
Carmyllie Light Railway
Great Central and Midland Joint Railway
Great Central & North Staffordshire Joint Railway
Great Northern and London and North Western Joint Railway
Halifax and Ovenden Junction Railway
Methley Railway
Midland and Great Northern Joint Railway
Norfolk and Suffolk Joint Railway
Oldham, Ashton and Guide Bridge Railway
Otley & Ilkley Railway
Perth General Station
Prince’s Dock, Glasgow
South Yorkshire Joint Railway
Swinton and Knottingley Joint Railway
Tottenham & Hampstead Junction Railway
Great Western and Great Central Joint Railway