This facility produces fast neutrons by stopping a beam of protons in a block of tungsten. These fast neutrons are slowed by scattering in heavy water at room temperature, then slowed further in superfluid (liquid) helium. This facility is capable of capturing neutrons at observable speeds of 7 metres per second or 25km per hour.At this speed, neutrons can be trapped inside special “bottles” and observed.The flagship experiment for the UCN facility will be a world-leading search for the neutron electric dipole moment of the neutron, which may help us better understand matter-antimatter asymmetry and progress research beyond the Standard Model of particle physics.