See Br. for more
BR
/ˌbiː ˈɑː $ -ˈɑːr/ noun [singular]

British Rail
/ˌbiː ˈɑː $ -ˈɑːr/ noun [singular]

British Rail
Br
Br. (also Br British English)
1. the written abbreviation of brother
2. the written abbreviation of British
Br. (also Br British English)
1. the written abbreviation of brother
2. the written abbreviation of British