Hi,
Please can someone recommend:
a) some Christmas duets
b) some flute choir Christmas music (piccolo, flute, alto flute, bass flute)

Thankyou

Not quite either, but there is a really good flute quartet arrangement of Rudolph the Red-nosed Reindeer.
It's here.

Ooo, thanks

Nicki, there is lots of stuff on the June Emerson site www.juneemerson.co.uk.

If you look in the big flute catalogue for Christmas flute choir/quartets/duets I'm sure it will throw up lots of things. I know that's not the same as a personal recommendation, but there are also difficulty ratings, so you can choose something you feel is appropriate.