The overarching scientific objective of PROTECT is to assess and project changes in the land-based cryosphere, with fully quantified uncertainties, in order to produce robust global, regional and local projections of SLR on a range of timescales. The project will place particular emphasis on the low-probability, high impact scenarios (referred to as high-end scenarios hereafter) [Stammer et al., 2019] that are of greatest interest to coastal planning stakeholders. A novelty in PROTECT is the strong interaction between these stakeholders and the sea-level scientists, ranging from glaciologists to coastal impact specialists, to identify relevant risks and opportunities from global to local scales and enhance European competitiveness in the provision of climate services.