Thank you all for your thoughts and advice, be it on here or via PM's; it's all greatly appreciated.
As I'd said in the original post, this was really just intended as a "What if...?" question, which would either tell me such a thing may be feasible after 'x' amount of training and legislation, or would not be feasible at all.
Given the answers received so far, which have helped me to increase my understanding of such matters, I can see that the idea is a no-go.
Still, it hasn't been an entirely pointless exercise, as I've learned a lot from you all, and been given some pointers which may well become useful for me at a later date.
Thanks all,
BeauMan