Tony makes very good points about the Bobby Bland 'soul' output of the 60s. The Bland sound of this period is really BB interpreting the sounds and recording personalities of (among others) Joe Medwick and Oscar Perry. Masterly interpretations, mind, but still facsimiles of other artists' music. I'm pretty certain that however badly these writers were paid by Robey it made some degree of financial sense to have their songs recorded and released by Bobby Bland. Both artists had tracks released by Robey in their own right (although perhaps not their strongest material, which would have been reserved for Bland) and failed to break out commercially.
None of this is to knock Bobby Bland: how can you? To me he is one of the 20th century's great interpreters of popular song, up there with Frank Sinatra or Elvis Presley.
The Hucknall project is not surprising in any way. I won't be listening and I'm pretty confident that MH no longer has the artistic credibility to turn novice listeners on to the great music he will be referencing. Had he done so in his commercial heyday the outcome might have been slightly different. On a related note I suppose I'm relatively pleased it's Hucknall doing this rather than my personal bªte noire, Van Morrison.