1st part:
Every aircraft BAC produces will start with BAC, for example: BAC-XX-XXXX
If a collaborative build, or someone produces a part for said aircraft It will be a BAC - XXXXX-XX-XXXX aircraft.

2nd part:
Every aircraft will have a designation system, it can have a max of 4 designations:

A=attacker [has bombs and guns], B=Bomber, C=Cargo, D=Drone, F=fighter [guns only], G=Glider, H=Helicopter, I=Intelligence, L=Long Range, O=Observation [also called patrol], P=Passenger, Q=Unmanned aircraft, R=Reconnaissance, S=Stealth, T=Trainer, U=Utility, V=Staff transport, X=Experimental/unnamed

3d part:
Numbering system:
EVERY BAC aircraft should have a number at the end. For Example:

BAC - A/C/L/S - 1

4th sometimes used part:

Used mostly on cargo and passenger planes, lets set up another example:

BAC - P/C - 1000 series.

next aircraft in the series would be:

BAC - P/C - 1100 series.

etc until a new series is made, I, E 2000.

for another example, but of a variation of a series:

BAC - P/C - 1000-100 series
next variation would be:
BAC - P/C - 1000-110 series.

• BAC CEO - BJLB