Heritage Open Day: Discover the last working nail forge in England, and the only nail forge in Britain, with its original hearth and chimney. The building dates from the 19th century and was still producing nails in the 1940s. There are three rooms, each of which would originally have had its own hearth. The hearth is the fire pit where iron rods were heated to a temperature high enough to make the metal workable. The fire would have been brought to the correct temperature by forcing air through the fire from hand-operated bellows. The bellows currently in the forge may not be original but are certainly at least a hundred and fifty years old.