SI 2018/910. This Order amends the Plant Health (England) Order 2015 (SI 2015/610). Comes into force 21st August. It introduces emergency measures to prevent the introduction of Thaumetopoea processionea L. (the Oak Processionary Moth) into the area in England which is recognised as a protected zone for this harmful plant pest. In particular, the Order imposes additional requirements on the introduction of certain plants of Quercus L. into the protected zone and on their movement within that zone.