Foxyankee,
Kittiwake is the newish bmi regional call sign. This was introduced due to the carbon trading scheme requiring differentiation from mainline for monitoring the scheme. Midland is used on the mainline work and beeline on the Brussels wet lease and Airbus work uses the kittiwake call sign.
You can't have the same designator on the transponder with different call signs .
Using bmr I think boomerang would have be much better if available.
The French seem to struggle with the call sign and we have been called kittihawk, kitty kittiwaker and a few others bordering on the perverse
D and F
