LyC leakage is crucial to the process known as Reionization which is theorised to have occurred between redshift z=11 and z=7, that is to say within the first 10% of the age of the Universe.[11] Reionization, or The Epoch of Reionization (EofR), is the period during which the gas in the early Universe went from being almost completely neutral to a state in which it became almost completely ionized.[12] The EofR is intimately linked to many fundamental questions in cosmology, structure formation and evolution.[12]