Original sentence: However the emphasis once placed on the cadet unit is no longer fostered.It once had a strength of nearly 400, due to the compulsory nature of service from halfway through Year Eight to halfway through Year Eleven.This is due to time shortages with reduced time made available and frequency of sessions
Edited sentence: However the emphasis once placed on the cadet unit in no longer fostered.It once boasted strength of nearly 400, due to the compulsory nature of service from halfway through Year Eight to halfway through Year Eleven.This is due to time shortages with reduced time made available and frequency of sessions (which makes more Cadet-related non-TMP activities occur to reduce boredom)