Lathan was a parliamentary candidate at successive general elections. In 1922 he was defeated in Enfield, then in 1923 and 1924 he stood in Sheffield Park, finally winning the seat in 1929.
Lathan was a parliamentary contender at consecutive general elections. In 1922 he lost in Enfield, then in 1923 and 1924 he ran in Sheffield Park, ultimately securing the seat in 1929.