TC; the tone of your last post is akin to that of a victorian governess! I bet you are a great boss to work under!
Regarding the commercial pilot tax allowance, I have already suggested to Brilliant Stuff how to get further information on this.
BALPA worked long and hard to get this tax break for ALL uk commercial pilots.
TC, you have already expressed your distain of BALPA, so why should I hold your hand and lead you to the answers?
Most people posting here are quite capable of using Google to find the answer.
(Perhaps a "professional" who ignorantly knocks a professional association and appears not to know the difference between a JAA CPL and an JAA ATPL also can't work a search engine.
)