Just posted on the other thread on making router planes, got me thinking that this is probably one of the few last strands of woodworking tool manufacture that small firms or even one-person setups can still make a difference.
I appreciate that Karl Hotley probably totally contradicts that statement but you get the idea.
If it were me, I'd be looking for a new design that uses off the shelf tooling from an already established vendor . Of course that dictates the design of the tool holding but it simplifies the manufacture process of the tool itself. I think the splayed handles on the Veritas are a better design in my opinion and I suspect this is based on (researched) function more than form based on how Lee Valley design their tools. I also think there is some mileage in the way the Veritas range of custom planes allows for changes of handles, frogs and blade types at point of purchase. that could be followed through to a router plane in different handles (width, height and shape) and different base plates, etc.
Any new tool manufacturer in the UK deserves all the support it can get, I wish you luck.