Machine designers in the UK and Europe are familiar with designing guarding in accordance with the requirements of EN 294, 'Safety of machinery - Safety distances to prevent danger zones being reached by the upper limbs,' but this standard has now been superseded and replaced by a European/International standard EN ISO 13857:2008, 'Safety of machinery - Safety distances to prevent hazard zones being reached by upper and lower limbs.' Furthermore, this standard also supersedes and replaces EN 811, 'Safety of machinery - Safety distances to prevent danger zones being reached by the lower limbs.' Of course, the British Standard equivalents of these three are BS EN ISO 13857:2008, BS EN 294:1992 and BS EN 811:1997.