Inconclusive. It could be Tony Sheridan alone for all we know. What I know is that the 'mystery cuts', tracks 19 & 22 of the album sound like they were made by the same artist. It's a reach, but assuming said artist was Tony Sheridan himself, 'Beat Brothers' is justified.
Since track 22 is already credited to Beat Brothers, I'll call this that as well and will change it if I find out otherwise.