UK masonry stoves - new company manufacturing precast cores

Cornish Masonry Stoves

These guys are manufacturing CE marked precast masonry stoves (basically essential to install in the uk). I'm considering one to install in our new place. Rocket stoves are sadly out of the question (listed building will be under scrutiny from the council) and we don't have the space to install a full size masonry stove.

What do people think?