The song is Late Hour Blues.
Written by the New Orleans-born pianist Richard M. Jones in 1939, it was recorded by Georgia White for Decca (the company for which Richard Jones was a record producer at the time). It was Decca's catalogue number 7741B (65756).
Tuba Skinny take the song briskly in Bb. They make a great job of it. Like Georgia White, Erika sings choruses between instrumental solos. Georgia sings four 16-bar choruses. Erika sings five. The final two are sung without an instrumental break. They appropriately include the 'Oh Me! Oh My!' Chorus for a second time - thereby achieving the five choruses in all.