This is a lovely enamel badge from before WW2.
It was made to give to workers at the London and North Eastern Railway. The LNER was one of the “Big Four” regional companies created in 1923. The railway was famous for running the east-coast mainline, “Flying Scotsman” and “Night Scotsman” sleeper service to Edinburgh out of King’s Cross.
The badge is numbered on the reverse, 98827. Presumably, there’s a list somewhere that would tell us who this particular badge was awarded to.