Just an FYI.

The default squadron Nieuport 10C1 used by the HQ Sqd 1 Wing RNAS in January 16 is a hybrid with French roundels on the wings and British on the fuselage.

As far as I remember from my readings, the RFC (and RNAS) didn't standardize on British roundels until about early or mid-1916. If you fly early war, you will often therefore see a mixture of French- and British-style roundels and other insignia - which would explain such markings on a Nieup. 10.

Happy early war flying with mixed insignia,

This is correct - history eh! If you search this has come up a few times.

Ok here's one thread on it:
https://SimHQ.com/forum/ubbthreads.php/topics/4533931/skin-errors

TY. I quickly went through what research material I have but did not come across this piece of history.