[tjradcliffe]

The NAZIs had some nuclear research, but its a stretch to call it a bomb program, as they hadn't even done the most basic back-of-the-envelope calculations as to the size of assembly required for criticality. Thus Heisenberg's initial estimate at Farm Hall was wildly wrong, but he refined it to something more-or-less correct in about a week.

If anyone at Farm Hall had been working on a bomb program of any kind they would have done that basic diffusion equation calculation the very first thing, before they even started, to get an idea if the whole thing was practical. No one did. Ergo, no one was working on a bomb, or if they were they were spectacularly incompetent.