Regional IAS Management Plan (RIMP) for the East of England This document was written as part of the RAPID LIFE project and can be found here. The purpose of the document is to guide IAS (also known as Invasive Non-Native Species or INNS) management activities for the East of England and sets out management priorities based on a species risk and relative occurrence within catchments in the East of England, including listing alert species for prevention, eradication and long term management priorities.