Which British Railway was first to standardise electric lighting in its fleet of carriages?

Question

Which British Railway was first to standardise electric lighting in its fleet of carriages?

Answer 1

Gas lighting had replaced oil, but after some horrendous fires following accidents the railways started to use electric lighting. Our four Metropolitan Railway coaches, the last of which is currently under repair in the carriage shed, were some of the very first to be electrically lit. On these though you can still see the stage-coach influence, in the "tumblehome" at the ends of the coaches.

Answer 2

To be honest, there was never just one. It was a unanimous decision, as stated before, due to problems and accidents with Gas lighting.