If there is a Bake-off, I think Sara at Wren will win, from what I have heard.
Bad blood? I chat with Wren pretty often, and in my dealings with them, I have NEVER heard them act like that, never heard them say anything bad about Heward, they have never acted in anything but a gentlemanly(or ladylike) manner, EVER.
I don't speak for Wren, but from what I know, any rumors of bad blood, or any implication that they might harbor any ill thoughts about Heward, well, I have serious doubts about that.
Just thought it needed saying.
I think there will be more Wasps about and being demoed very soon, the only thing that will convince the world is to get the engines out there and flown.