CORRECT!!!! Well done, your grace, but I did make it rather easy for you with my final hints.
How is "if..." associated with the use of a crusader?
The schoolboy heroes of the film, Mick Travis (Malcolm McDowell), Johnny(David Wood), Wallace (Richard Warwick), and the luscious little Bobby Phillips

*[see note below]* (Rupert Webster, sadly deceased several years ago

) are the "crusaders" (that having been the original title of the script), who oppose and fight the oppressive elements in College House, the school at large, and indeed wider society itself (mainly metaphorically in this final case).
The various rebellions they conduct increase in tempo and violence, culminating in the rather famous footage of the gun battle atop the chapel roof.
The film is one of my great favourites,(it influenced much that came after it, such as the name of the main character in Taxi Driver) and one was a bit of a rebel without a cause in an old, private (public in the British sense) school that was quite the bastion of privilege. I never went so far as to bayonet the chaplain, set fire to the school, shoot the headmaster, steal motorcycles, and bed younger boys, but it is the thought that counts.
Despite being the title of the original script there is only one reference to the crusaders in the film. Travis tells his friends that:"the crusaders flayed their victims and sent the neatly folded skins home to the victim's families."
Thus, I thought to myself, "Simon, why not put a little history into your choice of avatar, rather than simply select one at random."
And the rest did follow.
As to the fate of the uranium, I will put it to work on some of my own ...projects...
* = One labels him as such as it seems at stages that the whole school is trying to seduce him in some way shape or form.

