I just received a very charming and encouraging rejection from Mr. Heath. He passed the chapters to his colleague and they both decided that it fell between genres and publishers would have a problem with that.
He's encouraged me to submit to him again when I have something else ready.
I emailed him back, thanked him for his response and told him I'd like to send the WW2 novel I'm beating into shape to him when it's done.
He responded that he'd be 'very glad' to look at it.
So yay.
I'd love to work with him.