at bhx the embraers are G-ERJx or G-EMB but the RJ's dont seem to follow any kind of pattern
The 146s (or Avro RJs if you prefer) were previously operated by Cityflyer out of Gatwick before Cityflyer was merged with BACX
hence Cityflyer - G-CF**
not sure about the G-BX** & G-BZ** ones though
Fried Chicken