PRN 55383 An archaeological watching brief discovered two features with extensive evidence for long-term heating. One of these was identified as a bloomery shaft furnace ; the other was presumably also associated with iron production or working, but is not typical of any known type of furnace (possibly a carburisation furnace). Sixteen samples were taken from the two samples. The slag is very unusual, having a very cindery composition, surprisingly highly magnetic and includes some unusual forms. The site must date from a period somewhere in the beginning of the Iron Age and the late Medieval period, when most bloomeries were replaced by blast furnace technology. Although there was no dating evidence from the features, their form and appearance woulf tend to suggest a date towards the later part of this range: perhaps the late Saxon or Medieval periods.{1}{2}