At the recent open day i overheard a CTC guy say the hold pool was around 120. After placing around 40 guys with EZY the pool is now down to 80ish.
Don't shoot the messenger on this one, just passing on what i overheard. I don't know the specifics either. May be the case that alot were on flexi terms. I'm sure there are guys out there who'll know more accurate numbers than this.
I imagine the holding pool figure gets averaged up/down depending on who you ask!