Thanks Bessiere, the Empress Dragoon band is a mix of conversions: some Les Higgins; the drum major is an Art Miniaturen Roustam with drums and drum sticks added. The Line Dragoon band is an exact copy of this:
The drum majors are for the Horse Grenadiers, Mamelukes and Polish Lancers of the Guard - all plastic conversions.
One infantry band is S Range, one is HYTTY, one is Airfix Foot Guards with head changes.
My diorama is Waterloo - we know that 150 bandsmen went forward with the attack of the Imperial Guard but I must admit that there is no evidence of mounted bands at Waterloo - but then no evidence to say that there wasn't and I like to think that the Louis XVIII army of 1814-15 would have had such bands and they wouldn't have stayed behind in Paris. But I'm probably indulging in wishful thinking!