Woodburner heat powered fan (Bridlington YO16)

The fan sits on top of the woodburner and spins to distribute the warm air through the room, it is powered by converting the heat to electricity. Unfortunately, the heat exchange needs tinkering with. Apparently, if you used a Hornby train battery or similar that would fix the fan. These are expensive, so it would seem terrible to chuck it out. If anybody fancies tinkering with it, they're welcome to it.