I could do that. 

If it doesn't work out, I will step back and let the RP take its natural course. Though I think I've got this covered. 

So what're we talking here? Russians? Chinese? I'm trying to think of a logical enemy in this situation; who'd be able to sweep through Western Europe and then land on Britain? Obviously there's going to be a bit of room for fantasy on whoever these guys are, and I'm not going to complain with whatever you choose. However, the quicker I know who it is, the quicker I can start researching the sort of equipment and tactics they might employ. 

Thanks for hearing me out by the way.