Solar energetic particles including protons, alpha particles, heavier ions, and electrons are accelerated from the solar corona and in interplanetary space by shocks driven by coronal mass ejections. They arrive in bursts known as solar particle events, which are characterized by the increase of measured fluxes of up to several orders of magnitude depending on the instrument background level and particle energy. Spacecraft designers are interested in the SEP environment to derive total ionizing dose and total non-ionizing dose estimations, to determine the probabilities and rates of single event effects in electronic components, radiation background in sensors, and the contribution to hazards posed by radiation to astronauts. This talk looks at the needs of ESA missions and how new developments are addressing those needs considering the nature of the solar particle radiation environment and how it impacts different missions.