Look at section 9 of the Charge document. If the bank has more than £995,817 on 30 April 2018, this will be paid to the company. If on 30 September 2018, the account has more than £1,284,074, this will be paid to the company.
Does it seem likely these are expected deferred transfer fees (and in total or individually?). The dates presumably must be when other clubs are due to pay OUFC?
Rather than "screwing the club", it is more Eales getting protection for his 'investment' to be repaid. Tiger has spent enough time that he should know what the assets of the club were when he was buying it. The alternative would be to up the purchase price by £5Million using this to repay the Ensco debt, and then the club has the player contracts as unsecured assets, but conversely a higher amount due to Tiger if he'd put this into the club as debt.
What I think is of more concern is what funding Tiger has to :-
A> fund the structural losses of north of £1million per year excluding player transfers (which are now out of the picture for the foreseeable future)
B> get the club back running properly, and whether there is any prospect of challenging for promotion next season, assuming we are in L1.
C> what his plans for the club are? Is it a plaything, does he hope to flip it on like Eales has for a profit?