I'm mixed on this one. I don't make sausages, but have tasted several varieties of Lillian's outstanding offerings. As a keen cook I would be delighted and feel highly competetive to be competing against professionals, but if I didn't win I'd almost certainly think again - it's not faaaair! Having said that, surely someone in Lillian's position who rears and butchers their own beasts, then makes the sausages is actually in a better position than a butcher who is more commercial and will potentially pay less attention to detail.... Tricky.
I think mix them up, pros and ams in together. The proof will be in the sausages. My money's on Lil.