"was booting it on a VM at work, before realising I misread Dom0 as DomU...former refers to a Xen hypervisor, not a guest...it booted and installed the same as a standard ISO."
For so many of us that would be an automatic fireable offense. I hope OP has the autonomy to do that and remain unscathed.
*Edit: Reformatted
But most companies have less critical or testing environments available where people have some more space to play with.
And some teams like support, QA, Dev, etc usually have their own vm servers available to play with.
Where i work support analysts even had their personal servers they could do whatever they wanted, within reason of course. They still have access to VMs at AWS that they can start and destroy at will, but now there is just a few base images to choose from.