for what its worth i have set out what i think is wrong or questionable
bar 20 ( 2 bars before B) eb bass 4th beat should be C natural?
bar 23 1st and 2nd trom ( 2 bars after C) should be accents on 3rd and 4th beats? same on the next two choruses
bar 51 53 cornets not aligned with trombones on first beat, is this intentional?
bar 53 2nd trom should be e naturals on both quavers
bar 75 two bars after key change cornet off beats look wrong and not enough beats in the bar , should presumably be quavers on 2nd half of second beat and second half of 4th beat same as trombones.?
bar 79 should bass note on second half second beat be A eb bass and D Bb bass ? rather B and E?