Officially launched in May 2017, Le PRELE, Programme d’Espaces en Libre Evolution, is a participatory project coordinated by the Conservatory of Natural Spaces Normandy with the aim of bringing about a change of view of nature in free evolution. Through the actions developed under this programme, it will be sought to:“A better knowledge of the dynamic processes that drive these spaces,”A new look and contact around these spaces, the long-term preservation of a network of free-evolving spaces to be linked to the other natural sites managed and the green and blue frame.This programme is built in a participatory manner and a set of structures work together to define the guidelines and actions of the programme. The 2020 and 2021 Action Plan is the result of this. The PRELE is currently organised in three axes. For each, a working group composed of PRELE partners will meet to delineate its objectives into sub-objectives and action plans and thus initiate the implementation of the first actions.