British army uniform?

Firstly I have never heard of a No1 dress (Blues) tunic referred as "ebony" regardless of regt, secondly scarlets have now become the preserve of the Guards, although it was standard "walking out dress prior to 1914. Red jackets are still worn by Infantry Regts as Mess dress. (this is worn on Black tie occasions) No1s are worn when available and when appropriate. There have been several examples in recent years when they have been worn at investiture ceremonies etc.