The SSEB submitted designs for four types of reactor then being considered by HM Government for the next stage of the UK civil nuclear programme: the advanced gas-cooled reactor (AGR), the Steam Generating Heavy Water Reactor (SGHWR), the Light Water Reactor (LWR) and the High Temperature Reactor (HTR). In February 1975, the Secretary of State for Scotland granted the SSEB statutory consent for the location of future nuclear power stations and, after review of the four alternative reactor types, consent was given on 24 May 1978 for construction of the AGR station.