Sorry to be such a basket case today. The above is for G major on tenor (I think) and the first note of the sax solo is Bb. Am i right?
Sounds like Blues in F (ie in G for the tenor) to me. But I'm not sure I'd call that G major, exactly. Too many flat 3rds and 7ths (and other "funny" notes) around for the key to be so clear-cut. Eg Bb which is a flat 3 in G and is not in the G major scale.
Blow loud and bend it like Beckham