London Midland Region of British Railways

The London Midland Region (LMR) was one of the six regions created on the formation of the nationalised British Railways (BR), and initially consisted of ex-London, Midland and Scottish Railway (LMS) lines in England, Wales and Northern Ireland. The region was managed first from buildings adjacent to Euston station, and later from Stanier House in Birmingham.

Source: Wikipedia — London Midland Region of British Railways (CC BY-SA 4.0)