The Isaac Newton Group of Telescopes (ING) operates the 4.2 metre William Herschel Telescope (WHT) and the 2.5 metre Isaac Newton Telescope (INT) at the Roque de los Muchachos Observatory, La Palma, Spain. The ING is funded by the Science and Technology Facilities Council (STFC) of the United Kingdom, the Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO) of the Netherlands, and the Instituto de Astrofísica de Canarias (IAC) in Spain.