On this day 100 years ago, the four railway companies established by the 'Grouping' in mainland Great Britain were formally vested. So happy birthday GWR*, LMS, LNER and SR!
[*the GWR existed before 1923, but became a rather larger concern afterwards.] Also, on this day in 1948 the Big Four were nationalised to create British Railways, so happy 75th birthday BR!

More info:
https://www.youtube.com/watch?v=j7DpihQj4XU
A celebration of Big Four locomotives:
https://www.youtube.com/watch?v=f49QPioKdjY
Happy New Year!
Paul
[*the GWR existed before 1923, but became a rather larger concern afterwards.] Also, on this day in 1948 the Big Four were nationalised to create British Railways, so happy 75th birthday BR!

More info:
https://www.youtube.com/watch?v=j7DpihQj4XU
A celebration of Big Four locomotives:
https://www.youtube.com/watch?v=f49QPioKdjY
Happy New Year!
Paul